Hi Linda and Niccolo, welcome. Most people here feed a low carb canned food such as Fancy Feast Classic or Friskies Pate. Stay away from the ones that have gravy they are also high in carbs. My cat, Colin, also has neuropathy, weak back legs. For that he gets Zobaline,a form of B12, which can be purchased on the internet. or some people give B12 shots. It would be good if you could purchase a glucometer and begin testing Niccolo's glucose before you change his food. That way you can be sure that he's not getting too much insulin as a change to the low carb food can lower BG drastically.