My cat is walking flat on his back feet. He is asthmatic and has been receiving regular steroid shots for years for this. He is slightly overweight and I already had one diabetic cat so I am familiar with this issue in cats. Before this leg issue I took him to find out if he was diabetic as well and they did the UA to see what his glucose levels were. They came back very low so they are convinced that he is not diabetic. He does drink a lot of water and his urination in the littr box is very large just like my other cat however the vet attributed this to the steroids. He eats and drinks normally and his demeanor is very happy other than the fact that he cannot walk normally. He is on science diet W/D food so he can lose some weight. An X-Ray showed nothing abnormal. What is wrong with my cat??