Idiopathic Vestibular Syndrome

My Dog Has Idiopathic Vestibular Syndrome And Has No Appetite. How Can I Get Her To Eat?

She is 15 y and has had this illness for more than two weeks now, and although she is steadier on her feet, she is very weak and refuses to eat. I am feeding her by hand and we have tried dog food, cat food, baby food, chicken, liver, raw food, treats. She will pick a few morsels for a while and then totally refuses to eat.