Hello, in September he had to go to the vet for an emergency appointment because he could barely walk on his hind legs. The vet said the blood tests were fine, that it could be a urinary tract infection or diabetic neuropathy. He based his diagnosis on that result without doing any tests. He told me that Lantus wasn't regulating the cat's blood sugar and that perhaps that's why he was developing diabetic neuropathy. Currently, I'm giving him a vitamin complex of B6, B12, and B9 on my own; I give him one pill a day. The cat walks well now, but it's true that when I touch his hind legs, they feel very thin, as if he has no muscle. He used to be a great climber, and since that relapse in September, he hasn't climbed anything at all. If he wants to get on the sofa or the bed, he doesn't jump up like he used to; he climbs up with his front paws. He doesn't go up to his scratching post like he always did, and his movements are slow. His legs aren't as swollen as they used to be. He has diabetic neuropathy, but his legs are normal. I thought I'd help him with some extra supplements to help him gain muscle mass.