This is an on-going attempt to capture some of those for veterinary students. Two-thirds of lactating dairy cows at rest should be chewing their cuds at any one time. Cows congregate at doorways or other places where there is fresh air. Eave openings should be a minimum of 1 inche per 10 feet of barn width. Each group should have at least 2 waterers and 2 feet of space per 20 cows.
Stalls fail because of no lunge space, poor neck rail placement, lack of cushion.
Good footing and floor groving but not rough. Four row barns are cooler than six. Kneel down on with knee on area where cow lies. If your pant leg remains dry, you have enough bedding. From two feet up, drop to both of your knees.