I have a cat, at least 16 years old, who is not interested in food. On Sunday when I noticed it she had some food in the morning and none for the rest of the day. In the morning she puked everything up and tried to go to the bathroom in inappropriate places. She was also extremely sluggish, sleeping a lot. She also had discharge from both her eyes.
I took her to the vet on Monday and since she hadn't eaten anything I asked they do bloodwork.
The vet looked her over and the bloodwork came back normal.
When I took her home she was slightly perkier and ate some. Tuesday she started out perkier and ate a little but then refused to eat later on.
Today she is basically eating nothing.
The vet suggested maybe IBS (but that doesn't explain the sluggishness...) and recommended an X-ray. I don't want to put her through tests that seem pointless (if this actually makes sense sure). She seems sick to me. On monday he checked her temperature but I guess found nothing. One time I was cuddling her and her ears seemed warm (odd they usually seem cold). Also she seems to really want warmth much more than usual (another sign of a fever).
She had hyperthyroid and was treated with radiation. She has become increasingly disinterested in food, but the sudden change recently is a dramatic shift.
I'm calling another vet at the office.