I'm hoping to pick some brains here, please. My cat is just about to turn 17 and since December we've noticed a huge change in him. First he began yowling in the evening, then gradually became more ravenous. A blood test is January came back all clear, so the vet treated him for worms. Since then, he's got worse. He occasionally yowls during the day as well as the evenings, has started trying to eat food off our plates (while we're eating), jumping onto the hob while I'm cooking, and he's losing weight. Another visit to the vet this week showed that he'd lost nearly 20% of his weight in two months, he's now 2250 grams. A blood test showed slightly raised lipase, a urine test showed raised white blood cells, and his heart rate was 200 which is the higher side of normal. The vet has now given us antibiotics to try and rule out a urine infection, but admitted that wouldn't account for most of his symptoms.
Has anyone had any similar experiences? I'm just wondering if there's anything I should be bringing up with the vet?