Good Morning and welcome to Just answer. I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
There is a reason that Winona is not wanting to eat. Since her temperature is normal, then his may be a viral disease that is causing this and this will respond to antibiotics as a preventative and anti inflammatory medication. It does not sound like she has a digestive issue but this is hard to tell unless she appears bloated. For now, give her Pencillin G daily and 1/2 cup of mineral oil per 50 pounds of her weight every 4 hrs.This will neutralize any gas producing bacteria that could cause her distress. Force feed her a small amount of the grain mixture and then give her aspirin boluses at 2 mg per pound of her weight every 12 hrs. If Winona does not improve by Monday, have your vet examine her to see if we missed something.