My horses tend to get in trouble at night. My vet has jokingly asked if he is ever going to see my farm during the daylight (though he does - when he comes out for yearly coggins). Sometimes if your horse is sick or something you need to start meds at night, but yes - I agree, you should be around to keep checking on them as well. My horses are on my property, so that is not a problem. But that is what I meant by unavoidable at times, otherwise its a good rule.