Thread: Kitten not Eating and Sleeping All Day

You must try to get him eating, as he will feel worse, then he will not not eat at all, which is dangerous for all cats, with possibility of liver damage. Tempt him with various foods, or even kitten milk. You can make up an electrolyte fluid, which may help at least give a little energy, with powdered glucose, boiled water and a pinch of salt. If he vomits after you get him to eat, take him back to vets, it may be nothing to do with the vaccine, he may have swallowed something he shouldn't have, causing a blockage.