For about 3 months now, my 17-year-old cat has been experiencing massive stomach rumblings and growlings. She's also lost a pound of her 9-pound weight. However, she doesn't seem to feel bad in the least. I've had her to the vet twice and had a full blood workup done, all results were good. My vet suggested giving her yogurt, which I did for a week with no improvement, then he gave me an enzyme pill to give her, again no improvement. I put her on amoxycillin for a week, no change. Does anyone have a suggestion for this problem?