He hasn't had anything since Wednesday night except a few treats. He went to the vets this afternoon , he doesn't have a temperature so the vet gave him a jab to kickstart his appetite and wants to see him again tomorrow if he doesn't perk up.Anyone know how soon that normally kicks in?? He really cant afford at 3.4k to lose anymore weight. Gizzy also seems a bit off his food today and a little lethargic. Is is possible for cats to pass round a tummy bug? Jerry is fine , eating like a horse an full of beans.