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Cowdemy atlas

All sheets

Each sheet is one URL: a focus sequence, field notes, numbers, signs, and a quick check.

Rumen

Fermentation, fiber, and starch load

  1. FIG. 01Inside the rumenA dairy cow is a microbial fermentation system. Open the vat: four compartments, a stratified rumen, chewing, acids, and what leaves downstream.Foundation · 12 min · 8 notes
  2. FIG. 02Starch load & SARAWatch the same rumen when starch arrives too fast: pH spends hours too low, milk fat slips, and the fiber mat thins.Applied · 11 min · 4 notes
  3. FIG. 03Physically effective fiberParticle size is what makes a high-energy diet still chew. Learn the sieves, the mat, and the ration the cow actually eats.Applied · 11 min · 8 notes

Udder

Mammary anatomy and mastitis pathways

  1. FIG. 04Inside the udderFour independent quarters, a teat canal, cisterns, and alveoli. Learn the normal map before you talk mastitis.Foundation · 10 min · 1 notes
  2. FIG. 05Mastitis pathwaysAlmost every intramammary infection walks in through the teat canal. See contagious versus environmental paths before you blame the tank.Applied · 12 min · 5 notes

Hoof

Claw map, lesions, recognition, and risk

  1. FIG. 06Map the hoofNormal anatomy first: claws, capsule, sole zones, corium, digital cushion, and how horn grows and wears.Foundation · 10 min · 0 notes
  2. FIG. 07Claw-horn lesionsSole haemorrhage, sole ulcer, white-line disease, thin and double sole, toe and wall lesions — what tissue failed and where.Applied · 10 min · 1 notes
  3. FIG. 08Skin & infectious lesionsDigital dermatitis, interdigital dermatitis, heel-horn erosion, interdigital phlegmon, and hyperplasia — skin and the cleft, not the sole plate.Applied · 10 min · 1 notes
  4. FIG. 09From lameness to lesionMost dairy lameness is a foot. Score the walk, localize the limb, look at the foot, name the lesion, record it — and know when it is not the hoof.Foundation · 11 min · 3 notes
  5. FIG. 10Why hoof lesions developClaw-horn disruption is multifactorial: standing time, flooring, lying, transition and the digital cushion, hygiene, and trim. Not one cause.Applied · 11 min · 2 notes

Transition

The ±3-week window around calving

  1. FIG. 11The transition cowClose-up through early fresh: intake lags milk, calcium must adapt, the uterus involutes, and space is part of the protocol.Foundation · 12 min · 5 notes

Barn

Heat, stocking, water, and cow flow

  1. FIG. 12Heat stressHeat load is temperature plus humidity, not the office thermostat. Penn State: mild heat stress starts near THI 68 — shade, air, then water.Applied · 11 min · 5 notes
  2. FIG. 13Stocking & cow flowStocking is stalls, bunk, lying, lockup, holding, and movement — not one percentage. UW Dairyland: those resources fail separately.Applied · 11 min · 5 notes