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FOUR-COMPARTMENT STOMACH · FOUR COMPARTMENTSFOUR-COMPARTMENT STOMACH · EDUCATIONAL PLATELeft-flank view · rumen under the last ribEsophagusRumenDorsal + ventral sacsGas capFiber matLiquidReticulumOmasumAbomasumTo intestineRUMENRETICULUMOMASUMABOMASUM
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  1. Camera scores are screening — not diagnosesComputer-vision gait scores can prioritize cows and track herd trends — useful screening when camera setup is honest, never a veterinary diagnosis on their own.Hoof · From lameness to lesion
  2. Chop length is not peNDFChop length is a harvester setting; peNDF is the fiber structure that actually reaches the rumen after moisture, processing, mixing, and sorting.Rumen · Physically effective fiber
  3. Refusals read the peNDF storyShake fresh TMR and the refusal pile with the same particle separator — divergence shows whether formulated peNDF actually reached the cow.Rumen · Physically effective fiber
  4. Sorting steals the peNDFA correctly mixed TMR can still fail when cows pick fines and leave long forage — the consumed ration loses peNDF even though the ticket looked right.Rumen · Physically effective fiber
  5. Water is a fiber plasticizerForage dry matter changes how the TMR mixes and how the particle box reads — even when chop length matches a drier day.Rumen · Physically effective fiber
  6. A rising fetch list is a time-budget failureRobots succeed when cows choose the box and still get 12–14 hours lying. A climbing fetch list means the barn is stealing that time.Barn · Stocking & cow flow

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Sibling schools next door. Same family, different job — operations on the hoof, nutrition in the bunk.