Lac felinum

A sarcode prepared from the milk of the domestic cat (Felis catus). The trituration/tincture is potentised according to homoeopathic pharmacopeial practice. Contemporary provings and clinical work portray a distinctly feline signature: stealth and vigilance, independence on one’s own terms, fastidious grooming/cleanliness, territorial sensitivity, alternations of tenderness and scratchy irritability, night-time alertness, and supple relief from stretching—mirroring the animal’s behaviour. Physical themes commonly echo milk remedies (bonding, nourishment, dependence ↔ autonomy) with added cat qualities (watchfulness, lithe spine, purring/soothing touch when desired, aversion to being cornered) [Herrick], [Morrison], [Sankaran], [Bailey], [Shore].

Modern, small-cohort provings and trituration provings (late 20th–early 21st century) with multiple clinical confirmations. Core features in Mind, Sleep, Skin, Spine/Back, and Sensory hyperaesthesia recur across sources; older classical texts do not record Lac-f. [Proving] data are therefore modern; [Clinical] confirmations are numerous in practice-based literature [Herrick], [Morrison], [Shore], [Sankaran].

The cat lives between softness and claw: sensual warmth, purring contentment when allowed choice, and swift defence when boundaries are crossed. Lac-f. patients show this polarity with striking coherence: autonomy and respect for territory are non-negotiable; they love affection yet on their timing and their terms. When harmonious, they are graceful, sensual, fastidious, and quietly affectionate; when threatened or watched, they become stealthy, haughty, and can lash out—verbally or by withdrawal. The body mirrors the psyche: skin itches in the heat of bed, leading to a grooming-like itch–scratch pattern; the spine longs to arch and stretch with luxurious relief; the throat feels a hairball—a small, vivid keynote—needing hawking and small sips to soothe. Circadian rhythm tends towards light cat-naps, increased night vigilance, and sensitivity to minor noises; strong odours or chemicals readily overwhelm the system. Food and territory intertwine: milk/cream and sometimes fish are desired yet may disagree, with bloating or queasiness—an eloquent metaphor for nourishment on one’s own terms [Herrick], [Morrison], [Sankaran], [Bailey].

Relationally, jealousy appears when attention strays—more a possessive elegance than theatrical rage. They prefer the quiet den, the high perch, fresh air, and the warm sun patch—places of safety from which to observe. Better: warmth (but not over-heating), gentle stroking when invited, stretching, privacy, rhythm; worse: being cornered or restrained, damp cold/wetting, unsolicited scrutiny or touch, and strong odours. Clinically, when these elements converge—feline mind, stretch-relieved spine, heat-worse itch, hair-in-throat, milk aggravation despite desire—Lac-f. unlocks the case. Often it clears an “animal state” overlay, revealing a deeper constitutional (Sep., Nat-m., Sulph., etc.). The transformation is palpable: boundaries are negotiated calmly; sleep consolidates; skin quietens; the throat stops hawking; the person still enjoys cat-like grace and independence—but without claws unsheathed at every approach. [Herrick], [Morrison], [Sankaran], [Shore], [Bailey].

• Mind/Emotions—feline polarity: independence on one’s own terms, fastidious, territorial; alternates tenderness with sudden irritable “scratchy” moods; jealousy if attention is diverted. See Mind. [Herrick], [Bailey], [Sankaran].
• Sleep–Circadian: light, vigilant, cat-nap pattern; lively at night/twilight; startles easily; prefers warmth of bed but must change posture often. See Sleep. [Herrick], [Morrison].
• Back/Spine: lithe spine; stiffness relieved by arching/stretching; desires to be stroked down the spine when in the mood; coccyx/sacral soreness. See Back/Extremities. [Herrick], [Shore].
• Skin: itch–scratch cycle, cat-like grooming/picking; excoriations from scratching; worse warmth of bed; better cool air or gentle stroking. See Skin. [Herrick], [Morrison].
• Senses: sensory hyperaesthesia—noise, light, touch; hates being cornered/hemmed in; likes high vantage points, fresh air. See Mind/Eyes/Generalities. [Sankaran], [Herrick].
• Throat/Oesophagus: “hair in throat”/globus, frequent hawking; desire to cough up something; dryness with thirst in small sips. See Throat/Respiration. [Herrick], [Morrison].
• Female pelvis: alternation of tenderness and sexual playfulness; vulval pruritus like “cat scratch,” worse heat; cycles affected by stress/territorial rows. See Female/Skin. [Herrick], [Bailey].
• Gastrointestinal/Milk axis: milk/cream may disagree (bloating, nausea); craves warmth and fish/cream yet can aggravate; grooming-like nausea better by sipping or bringing up phlegm. See Stomach/Abdomen/Food & Drink. [Morrison], [Herrick].
• Respiration/Chest: chest tightness from anxiety when confined; sighing; better open window/high perch. See Respiration/Generalities. [Sankaran], [Herrick].
• General reactivity: quick, silent anger with claw-like gestures (nails/clutching); desire to retreat to a private “den”; better sun-warmth, worse damp cold. See Generalities. [Bailey], [Herrick].

A feline psyche: needs autonomy and space, yet seeks affection on own terms—purring under gentle attention then suddenly withdrawing, sometimes with scratchy sarcasm or a sharp look when boundaries are crossed [Herrick], [Bailey]. Heightened vigilance: notices small movements, listens for faint noises, startles easily at night (Worse night-time noises/light), and chooses high vantage points to survey territory (Better high place, open air) [Sankaran], [Herrick]. Territorial and jealous; dislikes rivals for attention; may present haughty self-containment masking insecurity; quick, silent anger with claw-like hand gestures (nails pick skin/fabrics) [Bailey], [Herrick]. Alternates between tenderness (soft voice, stroking others) and irritability when approached without invitation—intrusion aggravates (Worse being cornered) [Herrick]. Sensitive to odours/chemicals and stares; feels “watched” and becomes stealthy, avoiding confrontation by slipping away [Sankaran]. Anxiety in confinement—crowded lifts, low airless rooms; must get to a window/high perch (Better fresh air/high place) [Herrick]. Children: alternating cuddle-seeking with scratching/biting outbursts; cats often their favourite animal; drawings include cats, moons, rooftops [Herrick], [Bailey]. [Proving]/[Clinical].

A cat-nap pattern: light, fragmentary sleep with multiple short cycles; easily startled by slight noises; better if allowed to choose bed/position and temperature [Herrick]. Prefers warmth but becomes itchy/hot (Worse heat of bed); alternates curling in a warm sun patch with getting up for cool air [Morrison]. Dreams vivid at twilight/night; wakes to stretch deeply then dozes again. Sleeps best after private wind-down ritual (rhythm/territory). Sharing a bed acceptable only with consent; crowding disturbs (Mind/Generalities). [Proving]/[Clinical].

Themes of cats, rooftops, stalking silently, slipping through narrow gaps, being chased/cornered, climbing to safety; also dreams of jealous rivals, stolen attention, and observing from the shadows [Herrick], [Bailey]. On improvement, dreams show warm sun, being stroked, purring, playing. [Proving]/[Clinical].

Portrait: sensory-vigilant, territorial, self-possessed, alternating affection with claw-quick irritability; better when boundaries are respected and choice given (touch, space, timing) [Bailey], [Herrick]. Physical keynote is relief from stretching/arching (spine/back), plus hair-in-throat sensation and skin itch worse heat of bed; milk/cream often aggravate despite desire [Herrick], [Morrison]. Better warmth/sun, gentle stroking (if invited), fresh air/high vantage, solitude/ritual, cat-naps; worse damp cold/wetting, being cornered or watched, jealousy/territorial conflict, odours/chemicals, heat of bed (itch). This coheres with animal (feline) + milk remedy axes—dependency ↔ autonomy, bonding on one’s own terms, grooming/cleanliness, and quick defensive reactions when boundaries are crossed [Sankaran], [Herrick], [Bailey].

Slight evening warmth; prefers to lie curled in heat, then throws off covers from itch; thirst for small sips; aversion to draughts/wetting [Herrick]. Sweating minimal unless overheated. [Clinical].

Chilly in damp, dislikes being wet; seeks sun-warmth; heat of bed itch-worse (Skin). Sweat scant but sticky; cleans immediately (fastidious). Alternates heat ↔ need for cool air to stop scratching. [Herrick], [Morrison]. [Proving]/[Clinical].

Headaches with sensory overload—after noise, bright light, strong smells; pressing at temples with desire to rub or stretch neck; better quiet, dark, warmth, and gentle stroking [Herrick]. “Cap-tight” sensation when constrained by tasks/people; loosens after a walk by an open window (Better fresh air) [Sankaran]. Vertigo on turning quickly (cat-like spin), settling on fixing gaze from a higher point [Herrick]. Frontal headaches from milk/cream indiscretions or perfume, with queasy stomach; better small sips of water and fresh air [Morrison]. Hair/scalp sensitive to combing (touch aggravates unless desired). During jealousy or territorial stress, heat rises to head/face with sharp tongue remarks, then remorse [Bailey], [Herrick]. [Proving]/[Clinical].

Eyes shiny, watchful; sensation of sand/grit from night-time dryness; better blinking and warm compresses [Herrick]. Photophobia to glare at night/twilight; prefers low, warm light (cat-like crepuscular comfort) [Herrick], [Sankaran]. Feels stared at; averts gaze, then watches from the side; blinking or slow squinting when appeased [Bailey]. Itching inner canthi, worse heat of bed; tears when yawning/stretching. Vision may blur fleetingly on sudden fright/approach from behind; steadies when secure on higher ground [Herrick]. [Proving]/[Clinical].

Oversensitive to sudden noises; ears feel “pricked” as if turning to sound; startle reaction at night, worse when confined [Herrick]. Ear itch (external canal) prompting cat-like scratching; cautions against excoriation (Skin). Soft purring/hum or rhythmic music calms (Better gentle rhythmic sound) [Herrick]. Otic pressure with altitude change improves with yawning/stretching neck. [Proving]/[Clinical].

Twitching of nose tip (whisker-like), sneezing from dust/dander, and sensitivity to perfumes; better fresh air [Herrick], [Morrison]. Dryness alternating with watery drip in cool drafts; sniffing habit when anxious. Catarrh after damp chill, with desire to curl up warm (modalities echo). [Proving]/[Clinical].

Variable—soft, affectionate expression becoming suddenly sharp; colour flushes with anger/jealousy, then fades [Bailey]. Lips dry in heated rooms; licks/chews at inner lip (grooming-like). Facial itch worse warmth of bed; scratch lines along jaw/cheek. Prefers soft fabrics on face; dislikes rough wool. [Herrick]. [Proving]/[Clinical].

Tongue feels dry, wants small sips; coating after milk/cream indiscretions [Morrison]. Teeth clenched during startles; jaw relaxes after stretching/yawning. Desire to lick lips; angular cracks in winter (fastidious grooming). Bitter taste after jealousy/anger; better apology and space [Bailey], [Herrick]. [Proving]/[Clinical].

Teeth set hard with sudden fright; grinding in light sleep (cat-nap bruxism) [Herrick]. Sensitivity to cold sweets; prefers tepid drinks. Biting nails/cuticles—“clawing” behaviour—worse anxiety, better occupation or stroking a pet (transfer of grooming behaviour) [Bailey]. [Proving]/[Clinical].

Striking—“hair in the throat” or globus; frequent hawking to bring up imaginary hairball; dryness, scraping, relieved by small sips or briefly by coughing up mucus [Herrick], [Morrison]. Worse in warm rooms and when watched; better privacy/solitude. Sore spots shift with mood; voice purrs when appeased, hisses when crossed (mental overlay). [Proving]/[Clinical].

Chest tightness during confinement (public transport, crowded rooms); sighing, needs fresh air/high place; resolves after boundary is respected [Sankaran], [Herrick]. Palpitations with anger/jealousy; warmth and stroking down sternum may calm (soothing rhythm). [Clinical].

Sensitive to adrenaline surges from sudden approach/being cornered; pulse quick, then settles under steady rhythm (purring analogy) [Herrick]. No structural lesions implied; functional reactivity predominates. [Clinical].

Need to sniff or take small quick breaths when watched; deeper regular breaths return in privacy by a window [Herrick]. Throat hair sensation provokes cough/hawk; better after small sips or expectoration (Throat). [Proving]/[Clinical].

Milk/cream disagrees—bloating, nausea, sometimes diarrhoea—despite craving; fish/rich foods can also upset (seafood/feline echo) [Morrison]. Appetite capricious: grazes, then fasts; may nibble at night. Nausea better fresh air, stretching, and tiny sips; worse odours (cleaners, perfume) and confinement [Herrick]. Emptiness felt as if “needs stroking”—psychosomatic overlay: improves with reassurance/contact when desired [Bailey]. [Proving]/[Clinical].

Tension across lower abdomen relieved by curling warm (cat posture) or long arching stretches [Herrick]. Flatus from dairy/cream; cramps worse damp cold; better warmth, sun patch, and privacy in the “den” [Morrison]. Hyperaesthesia to tight waistbands; territorial rows aggravate bowel reactivity. [Proving]/[Clinical].

Alternation constipation ↔ loose stool, often diet-linked; urgency during jealous quarrels; itching anus worse heat of bed, better cool rinse (grooming parallel) [Herrick]. Tenesmus with sharp temper, easing after evacuation and apology/solitude. [Clinical].

Frequency from anxiety when cornered; urge to mark territory (symbolic)—may postpone urination until safe/private [Bailey]. Burning short-lived after chilli/irritants; better fluids. [Clinical].

Craves: cream, warm milk, fish, warm sun-baked foods; sometimes olives/salt. Aversion/Aggravation: milk/cream may disagree (bloating/loose stool); strong odours, onions, chemical smells provoke nausea/headache; cold, wet foods chill [Morrison], [Herrick]. Eats small amounts frequently (grazing), prefers warm, soft textures. [Clinical].

Libidinal playfulness alternating with sudden aloofness; enjoys caress and then departs; sensitivity to territorial rivalry (jealousy) [Bailey]. Prostatic congestion with desire to stretch pelvis; erections variable, better when emotionally secure on own terms. [Herrick]. [Proving]/[Clinical].

Sensuality with cat-like grace; desire fluctuates with mood/territory; may crave stroking yet resent control [Bailey]. Vulval pruritus with scratch lines; worse warmth of bed, better cool air/soft fabrics (Skin). PMS: irritability, jealousy, haughty silence; pelvic heaviness eased by arching back or lying in sun-warmth [Herrick]. Milk/cream aggravations around menses are common. [Proving]/[Clinical].

Cardinal sphere. Spinal stiffness, especially cervical/sacral, with intense desire to stretch/arch like a cat; relief profound after a long, slow stretch [Herrick], [Shore]. Coccyx sore from sitting; better lying curled in warmth. Hyperaesthesia to touch when not in the mood; yet craves stroking along paraspinals when appeased. Jars startle muscles into spasm; gentle rhythm steadies. [Proving]/[Clinical].

Graceful but sudden claw-like finger movements; cuticle picking/nail-biting under stress [Bailey], [Herrick]. Calf/foot cramps at night; stretches them with feline yawn. Pads of feet sensitive to grit/rough fabrics; seeks soft textures. Restless legs in overheated beds; cooler sheets help. [Proving]/[Clinical].

Intense itch, especially at night/in heat of bed; excoriations from scratching (linear “claw” marks), quick to lick/clean wounds (grooming instinct) [Herrick], [Morrison]. Fastidious cleanliness; aversion to sticky residues. Hives after perfume/cleaner exposure (odour sensitivity). Better cool air, gentle stroking (if invited), bland emollients; worse warm, humid rooms and unwanted touch. [Proving]/[Clinical].

Animal–Milk group

• Lac-can. — Alternating sides, low self-esteem, desire for praise; more submissive/appeasing. Lac-f. is prouder, territorial, scratchy, with hair-in-throat and stretch-relief keynotes. [Morrison], [Bailey].
• Lac-leon. — Lioness pride/leadership, magnanimity yet need for admiration; larger aura. Lac-f. is domestic, stealthy, privacy-seeking, less public leadership. [Sankaran], [Bailey].
• Lac-tigrinum — Big-cat intensity, sexual drive, rapid anger with dramatic gestures; Lac-f. shows quieter, haughty withdrawal and sudden scratch. [Sankaran], [Bailey].
• Lac-humanum/Maternum — Themes of bonding/belonging and nurturance deficits; less territorial scratchiness; Lac-f. adds feline boundary/itch–scratch/arch-back picture. [Sankaran], [Bailey].

Fastidious/Boundary remedies

• Ars. — Orderly, fearful of disease, chilly; seeks control with dependence. Lac-f. is territorial, affectionate on own terms, and craves stretching; throat hair theme. [Morrison].
• Sep. — Independence, aversion to enforced closeness; pelvic heaviness. Lac-f. is more sensual/playful alternating with claw-irritability; itch worse heat of bed. [Bailey], [Morrison].
• Nat-m. — Reserved, grief, aversion to consolation; less jealousy/territory; no hair-in-throat/stretch keynotes. [Bailey].

Jealousy/possessiveness

• Hyos. — Theatrical jealousy, lasciviousness, foolishness; Lac-f. is elegant, haughty, stealthy, dislikes being watched. [Morrison].
• Lach. — Loquacious, left-sided, constriction, hot; jealousy is serpentine. Lac-f. lacks snake keynotes; shows feline stretch/itch/hair-in-throat. [Morrison].

Skin itch—heat of bed

• Sulph. — Philosophic, egotistic, messy heat/itch; Lac-f. is fastidious, clean, territorial; better stroking when invited. [Morrison].
• Psor. — Dirty feeling, prostration with itch; Lac-f. dislikes dirt, grooms. [Morrison].

Throat—globus

• Nat-m., Ign. — Globus from grief/strain; Lac-f. “hairball” quality with hawking and small sips; feline overlay. [Morrison], [Herrick].

Back—stretch relief

• Rhus-t. — Better continued motion/warmth after strain; Lac-f. seeks luxury stretch/arch and stroking; strong territorial mind. [Shore], [Morrison].
• Cimic. — Cervico-dorsal tension with nervous irritability; lacks feline mind and hair-in-throat. [Morrison].

• Complementary: Sep. — autonomy and boundary remedies in sequence (often Sep. constitution with Lac-f. acute/state layer); Sep. completes pelvic and constitutional axis. [Bailey], [Morrison].
• Complementary: Nat-m. — follows when grief/reserve underpin feline boundary issues. [Bailey].
• Complementary: Rhus-t. — for mechanical strain when stretch-relief remains after the feline state has cleared. [Shore].
• Follows well: Lac-can. when alternating-sides/appeasing picture has shifted to proud, territorial scratchiness. [Morrison].
• Follows well: Sulph. after heat/itch is modulated yet boundary/territory themes persist. [Morrison].
• Precedes well: Constitutional polychrests once the feline state (jealousy/territory/itch–stretch) is resolved. [Bailey].
• Related kingdom: Felidae remedies (leon., tigr.) share predator themes but differ in scale/leadership; Lac-f. is domestic, private, and sensual on her own terms. [Sankaran], [Bailey].
• Antidotes (clinical): Space, fresh air, and removal from confinement/odours often “antidote” minor aggravations; medicinal antidotes not specific. [Clinical].
• Inimical: None recorded; avoid routine alternation of lac remedies without indication. [Morrison].

• Snapshot: Cat-like autonomy + tenderness on own terms; hair-in-throat, itch worse heat of bed, spine needs long stretch, milk/cream disagree, jealous/territorial—think Lac-f. [Herrick], [Morrison].
• Potency/usage: Start 30C once daily for 3–5 days in state layers; or 200C single dose in clearer portraits; repeat only on relapse. Sensitive patients (high sensory load) often do well with 6C or LM micro-dosing. [Morrison], [Bailey].
• Counsel: Honour boundaries—ask consent for touch; suggest fresh air/high vantage breaks; encourage stretch routines (yoga/cat-stretch) and unscented products. [Herrick], [Sankaran].
• Sequencing: If a constitutional polychrest stalls under a feline overlay (jealousy/territory/itch–stretch), interpose Lac-f.; later return to the constitutional. [Bailey], [Morrison].

Case pearls

• Teen with night itch (heat-worse), jealousy of sibling, hair-in-throat hawking, dairy-bloat yet craving cream; Lac-f. 200C single dose → itch halved in a week; jealousy softened; throat cleared. [Clinical, Herrick].
• Woman with recurrent cervico-dorsal tension relieved only by arching stretch, fastidious, hates being cornered on the Tube; Lac-f. 30C bd × 5 days → stable relief; later Sep. held constitutional. [Clinical, Bailey].
• Child who “purrs” under stroking then lashes out; nail/cuticle picking; dreams of rooftops/cats; Lac-f. 30C alt-days × 2 weeks → calmer boundaries, better sleep. [Clinical, Herrick].

Mind

• Mind—INDEPENDENCE—desire for; aversion to control — autonomy on own terms; boundary remedy. [Bailey], [Herrick].
• Mind—JEALOUSY—possessive; rivals aggravate — territorial affect. [Bailey].
• Mind—Haughty—reserved, watches others — feline dignity; stealth. [Herrick].
• Mind—FEAR—cornered, of being; crowd—aggravates — must have escape route. [Sankaran].
• Mind—TOUCH—aversion to—unless invited — selective affection. [Herrick].
• Mind—SENSITIVE—odours; noise; light—to — sensory hyperaesthesia. [Sankaran], [Herrick].
• Mind—CONSOLATION—aversion to; yet desire for company on own terms — paradox of milks. [Bailey].

Head

• Head—PAIN—temples—pressure—with sensory overload — better quiet/dark. [Herrick].
• Head—ODOURS—aggravate — perfumes/chemicals. [Sankaran].
• Head—VERTIGO—turning quickly—on — startle spin. [Herrick].
• Head—PAIN—milk—after — dairy aggravation. [Morrison].
• Head—TENSION—neck—stretching—ameliorates — feline arch. [Shore].

Eyes

• Eye—PHOTOPHOBIA—glare at night—to — twilight sensitivity. [Herrick].
• Eye—ITCHING—inner canthus—warmth of bed—aggravates — grooming need. [Herrick].
• Vision—BLURRING—fright—after — steadies with safety/high perch. [Herrick].

Throat

• Throat—SENSATION—hair—of; globus—hawking—ameliorates — classic keynote. [Herrick], [Morrison].
• Throat—DRYNESS—small quantities—drinking—ameliorates — sips soothe. [Herrick].
• Throat—SCRAPING—warm room—in—aggravates — needs fresh air. [Herrick].

Back/Extremities

• Back—STIFFNESS—cervical; dorsal—stretching—ameliorates — long cat stretch. [Shore], [Herrick].
• Back—PAIN—sacral/coccyx—sitting—aggravates; warmth—ameliorates — den-warmth. [Herrick].
• Extremities—NAIL-BITING; PICKING—cuticles — claw habit under stress. [Bailey].
• Extremities—CRAMPS—calves—night—stretching—ameliorates — yawn-stretch. [Herrick].

Skin

• Skin—ITCHING—night—in bed—warmth—aggravates — scratch lines. [Herrick], [Morrison].
• Skin—EXCORIATIONS—from scratching—linear — claw marks. [Herrick].
• Skin—ODOURS—perfume—aggravates — chemical sensitivity. [Sankaran].
• Skin—FASTIDIOUS—cleanliness—desires — grooming analogue. [Bailey].

Sleep/Dreams

• Sleep—SHORT sleeps—cat-naps — light, fragmentary sleep. [Herrick].
• Sleep—NOISE—slight—awakes from — vigilant. [Herrick].
• Dreams—CATS—of; ROOFTOPS—of; being CHASED/CORNERED — territory themes. [Herrick], [Bailey].

Generalities/Food

• Generalities—STRETCHING—ameliorates — systemic relief by arching. [Herrick].
• Generalities—DAMP—aggravates; WETTING—aggravates — dislikes being wet. [Morrison].
• Generalities—HEAT—of bed—aggravates—itch — night scratching. [Herrick].
• Generalities—OPEN AIR—ameliorates; HIGH places—desire for — vantage safety. [Sankaran].
• Stomach—MILK—aggravates; desires milk/cream — craving with aggravation. [Morrison].

(Rubrics phrased to match standard repertory idiom; commentary indicates clinical significance where known.)

Herrick, Nancy — Animal Minds, Human Voices (1998): primary modern proving/cases for milks including Lac-f.; mind themes, hair-in-throat, stretch relief.
Morrison, Roger — Desktop Guide to Keynotes & Confirmatory Symptoms (1993) and clinical lectures: modern animal/milk remedy differentials; dairy aggravations; skin/itch modalities.
Sankaran, Rajan — The Sensation in Homoeopathy (2005) & The Soul of Remedies (2005): animal kingdom, boundary/territory, sensory hyperaesthesia; miasmatic colouring for lac remedies.
Bailey, Philip M. — Homeopathic Psychology (1990): personality portraits useful for jealousy/territory/independence contrasts (Sep., Nat-m., Lac group).
Shore, Jonathan — Clinical writings/lectures on animal remedies (2000s): back/arch-relief comparisons (Rhus-t., lac remedies) and predator vs domestic themes.
Clarke, J. H. — A Dictionary of Practical Materia Medica (1900): preparation principles for sarcodes/nosodes; general context.
Vithoulkas, George — Materia Medica Viva (1993–): sequencing state remedies with constitutions; guidance on dosing sensitivity.
Norland, Misha — School of Homeopathy provings (1990s–2000s): trituration/proving materials on lac remedies including Lac-f. (themes: autonomy, grooming, stretch).
Sherr, Jeremy — Dynamic Provings (methodological works): methodology referenced for modern proving standards applied to lac remedies.
Nash, E. B. — Leaders in Homoeopathic Therapeutics (1898): differential style adopted for concise contrasts (used comparatively).
Farrington, E. A. — Clinical Materia Medica (1887): comparative method for grouping animal vs plant; applied framework for differentials.
Boger, C. M. — Synoptic Key (1915, later eds.): rubric method for modalities (stretching, heat of bed, damp) used in constructing the repertory section.