My 11 year old boy has just been diagnosed with diabetes. 
We're going to start insulin injections hopefully this week, and have our fingers crossed that it's manageable.
How have your cats tolerated insulin jabs? Are you rigid with their routine now? What do they eat? Are they happy and keeping well?
My boy is very much an outdoor cat and he's already grumpy that I'm keeping him in a bit more. I feel like he's not all that well at the moment, he's slow, sleeping lots, seeing far too much (and everywhere including his bed), he seems to have aged loads in the past couple of weeks.
All positive stories welcomed!