Diabetic Retinopathy Treatment Care

My cat Maggie was diagnosed a few months a go with diabetes; she is sluggish, and whenever she tries to get down from a high place she just kind of flumps down onto the floor. Help?

10 days ago diagnosed with diabetes. He has never been a dog to eat all his dinner at once (only his chicken) but the dried biscuits he used to go back to when he wanted. Now I have had to change his eating order he does not want to eat the biscuits. It has been suggested ti maybe put some gravey or a few vegetables with it. Any suggestions?