Excessive drinking and urinating with a healthy appetite and weight loss can be a sign of diabetes. Morgan didn't lose his fur before being diagnosed, but he got dandruff like flakes and his coat was dulled. He also would vomit more often. But the key to me was the drinking and urinating. I wouldn't begin to suggest Digit has diabetes, but a blood test would be a good thing to have done by your vet. A basic exam and blood test shouldn't cost $200. Just be sure to mention all symptoms.