My cat is about 17 years old in human years. The past year we have noticed he has gotten thinner and drinking more water. Recently we've noticed his hearing has gone. He still eats, runs around and jumps on high counters. Anyway, he has really bad dandruff and in his fur he has different spots of hair clumped and stuck together. If we took him to the vet in a car, that would probably kill him. What can I do? P.S. We have tried to brush out the fur and it works, but it hurts him.