Hi all, our cat, who is usually very greedy, is refusing to eat anything and I haven't seen him drink water. His appetite was low on Thursday and he wouldn't eat at all yesterday. He did try but was then slightly sick. I took him to the vet yesterday and she did a blood test which ruled out hypothyroidism. She said some of his electrolytes were a bit low and he was slightly dehydrated but otherwise everything was normal. She gave him an anti nausea injection. She said there didn't seem to be any obstructions. Anyway this morning he is the same. Came in seeming keen to eat but as soon as he went up to his bowl he seemed to not be able to. Any thoughts? He's not insured but we have savings set aside for vets fees. Should I take him back today if they couldn't find a problem yesterday? Has anyone got any suggestions about what the problem could be?