My skinny 11yr old Siamese has suddenly started eating more, drinking a lot of water and peeing a lot. Her lifelong companion died of diabetes 3 months ago. I'll take her to the vet today. Is it possible to control diabetes with diet only? In the country where I live, vets are super expensive. My cats have had nothing but dry Royal Canin food for years, then got them on wet food, same brand, then the trouble started. Could that be coincidence?