Hi Nancy,
I know what you mean with the loony bin comment! I feel similar - so thankful for the support here :mrgreen:
I recently posted this elsewhere in reply to another member, but since it's relevant, I will re-post here (hope you don't mind, just in a bit of a rush and figured I've already typed it all up :lol: ) I admit I really didn't think much was happening at first, but I would say give it at least a month, and see if Gus has improved in that time - it took a little longer for Jazz to make 'real' improvements, but I'm sooooo glad we persisted!
**Also, I thought this was a great idea - my vet recommended I take film footage (just with a digitial camera - or whatever you have/can borrow) of Jazz 'before' and 'after'... so I have the 'movie clip' of Jazz BEFORE we started insulin/B12 as a control, and then I make new little 'AFTER' films every now and then (or when I can actually catch her with the camera running about, etc!! :roll: ) of her jumping/walking/using stairs/running/etc.
It's a really good way of being able to
objectively compare her movement at different times, and it's proof that changes are/aren't occurring (can also be showed to your vet..

) I find it's very hard to accurately remember/describe exactly what her movement was like, and then contrast that with how she is now, and having the film footage avoids that problem entirely! :smile: Maybe that might be useful for you/Gus too?
My cat Jazz also has diabetic neuropathy, so I completely understand about the symptoms you describe and the worrying you are going through. It's really is an awful thing to watch your cat slipping around and having trouble just walking :sad:
Jazz had a lot of apparent stiffness in her hindlegs/hindquarters, and her back legs were slipping out from under her when she was walking around. When she was going somewhere, every few metres, she'd lie down on the floor to rest. She avoided jumping and even had trouble squatting to go to the toilet at one stage. It was terrible, and I hated to see her like that. :cry:
When she was diagnosed with diabetes at the vet, the vet thought that she had age-related osteo-arthritis (Jazz is 17 and only had 'stiffness' at that stage, the actual slipping/trembling developed almost immediately after the vet visit for some reason). She was prescribed custom compounded drugs (combination pain relief and anti-inflammatory I think) but I did a lot of reading and research before picking them up, and found the info about B12 that has already been mentioned here. (for more info, do read Jasper's page here if you haven't already:
http://www.laurieulrich.com/jasper/ ). I explained it all to the vet (who wasn't familiar with it incidentally) and we agreed to try the B12 and see how it went before starting any osteo-arthritis drugs. Please understand that every cat is different of course and you may not have the same kind of results as Jazz has - though I really hope you do!
I have been giving Jazz 3 mg B12 (methylcobalamin) daily since then and the difference is amazing. Granted I don't know if it's from the B12 or insulin or a combination, but she is now literally running around the garden and jumping on/off beds and sofas

I am sooo happy to see that of course!!! So do give the B12 a try, I didn't think it was working at first, but we persisted and after maybe 3 weeks I really started to see positive changes. All this is without the osteo-arthritis drugs, and I really think the issue was neuropathic, not arthritis related.
Be aware that if your cat has lost muscle condition in the hindlegs though (from a combination of not using them as much/in normal ways and breaking down body tissue to 'feed' herself as a result of the diabetes), he will continue to be weaker in that area, even if the neuropathy clears up, until the muscle condition is regained - so he might be a little wobbly as a result. You should be able to see that it's to do with that, rather than the nerve damage though.
I hope that is not too long, but I just wanted to share that the B12 really can help, and it's possible your cat's neuropathy will improve. Not sure where you are, but on the off chance you are in Australia, you can get B12 formulated just for cats here:
http://www.custommedicine.com.au/ (I just emailed him direct to discuss what I wanted). I use one 3 mg capsule per day, open it up and sprinkle half the powder on each meal. She eats it with no problem, doesn't seem to mind it at all. It does turn a hot pink colour when it absorbs moisture though so don't be alarmed!
Whatever type you get, make sure it is the methylcobalamin B12 (better utilized by the body, esp. for neuropathy) and that it does NOT contain xylitol (toxic to cats). I really hope that the B12 will help your kitty - definitely worth a try though!