I am a little worried about my Ashes, he appears to be unwell, yesterday he was fine in the morning , but by evening he was off his food, his fav food red meat, and he chose to stay outside on the verandah, but I brought him in beside the heater, he always sits close to it, but he was feeling the cold obviously as he was almost under it, its an oil filled heater.

He would stand up briefly for a few mins, then sit down again, I had decided if no improvement he was off to the white coats today, however this morning he was much perker, he ate his food happily, purred and looked much more bright eyed, he is not 100 per cent yet though.

I noticed a half eaten bird yesterday and wondered if he caught it and ate it, most of it was gone, and that has made him unwell, but he often gets unwell like for a day or two then comes right, I have mentioned it to the vet, but she does not seem too concerned, am I worrying needlessly or is there something more, I have thought of kidney illness or diabetes, but he seems to fit into neither category, I do notice his eyes look glazed when he is unwell.

Just thought you might all beable to offer me some suggestions, if he goes down-hill I will just take him to the vet and get him checked.

BTW he did not appear to have a temperature, to my knowledge,maybe he has a viral infection or something, he is vaccinated for cat flue so its not that.
Unfortunately I cannot check his poop and pee as he always goes outside, I have never seen him in the act.