Hi I'm a thoroughbred horsemen. I'm making a gift for a trotting trainer... a custom dry erase board for the barn. its for about 20 horses... although everyone's preferences may be different I'm looking for what the usual ones are.. In thoroughbreds it some would be.. stall number, horses name, temp, equip, days of the week, notes, shod... any help would be appreciated!

umm feed specs and turn-out schedule maybe. not sure what you mean by temp....

I don't think there would be a big difference in the info.
Maybe workout time/distance and Driver.
I'm not sure how much space they have but possibly 2/3-
One for feeds
Health-temp/legs/vet
Workout-time/distance/equip/legs/farrier

Temp=Temperature
Should be taken daily-preferrably @ the same time of day