You'll want to make sure that those caring for your animal know how to spot signs of a dangerous gastrointestinal condition called colic. Ask them what their standard course of action is in case of an emergency. Check to see whether the stalls have lights or whether lights can be installed. Request a stall that has access to an electrical outlet if you want to run a fan in the summer months. Ask how often the stalls are cleaned or mucked.
Horses tend to copy the behavior of their neighbors.
Keep your eyes open for anything that can hurt your animal. Check for hazards such as brick walls in stalls, barbed wire, protruding bolts or low entrances. Make sure all the other horses are current on their inoculations. Find out whether there is a vet in the area who makes barn calls, and locate the equine veterinary hospital nearest the boarding facility. Inc. How things get done.