Dairy nutrition
From the rumen to the ration: how cows turn forage and grain into milk, and how feeding mistakes show up in the tank.
Herd managers, feeders, nutritionists in training
Topic atlas · a BarnX learning platform
Open one topic. Get the whole system.
Cowdemy is BarnX's practical learning platform. Click a region of the cow. Land on one page: the four-compartment stomach, the short field notes, the numbers, the farm signs, and a five-question check.
The cow atlas
A dairy-cow silhouette with anatomically placed pins. Keyboard and catalog lists stay available so the drawing is never the only door.
Left-flank dairy map
Pins open a universe
Black Holstein on a PhyloPic CC0 Bos taurus silhouette — white face and udder only. Pins follow left-flank dairy anatomy.
Live universes
Foundation · 12 min · 4 field notes
Inside the rumen
Open a dairy cow’s fermentation system and see how forage, microbes, and rumen pH turn feed into milk energy.
Applied · 11 min · 3 field notes
Starch load and SARA
Watch the same rumen when starch arrives too fast: pH spends hours too low, milk fat slips, and the fiber mat thins.
Applied · 11 min · 2 field notes
Physically effective fiber
Particle size is what makes a high-energy diet still chew. Learn the sieves, the mat, and the ration the cow actually eats.
Foundation · 12 min · 2 field notes
Mastitis pathways
Almost every intramammary infection walks in through the teat canal. See contagious versus environmental paths before you blame the tank.
Applied · 11 min · 3 field notes
Heat stress load
Heat load is temperature plus humidity, not the office thermostat. Penn State: mild heat stress starts near THI 68 — shade, air, then water.
Foundation · 12 min · 2 field notes
Lameness and the hoof
Most dairy lameness is a foot lesion on a standing surface. Merck: claw disorders dominate — wall, sole, and interdigital skin fail in different ways.
Applied · 12 min · 2 field notes
Transition and the uterus
The uterus after calving is an open, involuting organ on a cow already in an energy hole. Penn State: protect intake. UW Dairyland: give her space to eat and lie.
Applied · 11 min · 2 field notes
Stocking and cow flow
Stocking density is stalls, bunk, and time — not a head count on a clipboard. UW Dairyland: overstocking steals lying and eating, and the fresh pen feels it first.
Cow health
Mastitis, heat stress, lameness, and transition disease — taught as systems you can see, not as glossary pages.
Herd health and parlor teams
Husbandry and housing
Comfort, stocking, water, and daily cow flow. The environment that makes nutrition and health possible.
Owners and barn staff
The Cowdemy family
Two learning areas. One BarnX platform.
Cowdemy is BarnX's practical learning platform for dairy and livestock knowledge. This atlas teaches the systems. Hoof Cowdemy and Feed Cowdemy are the focused programs for people working close to herds.
Operations for trim teams
Hoof Cowdemy
Practical hoof-health, trimming workflow, lesion tracking, and dairy hoof-care knowledge for trim teams and herd health staff.
Learn more →Feed and nutrition school
Feed Cowdemy
Practical feed, dairy nutrition, and livestock performance knowledge for teams who manage rations, feeding programs, and herd performance.
Learn more →