Sunday he threw up dry food 5 hours after eating. He was constipated. But ever since not wanting to eat all his food. Today skipped it completely. So tried syringing and sadly he puked it up. But there was still dry food after 7 hours. He has been on prednisolone for many years now and never had a flare where he wouldn't eat. Vet is out all week at a training conference. Any ideas on what to do?