Hi there Marilyn,
I'm not sure how much extra insulin you'd need as it would depend on how carb sensitive LB is. With Max I know dry food pushes his numbers up quite a lot. As a very rough guess if I was to feed him all dry I think I would need in the vicinity of 50 - 100% more insulin, but that's him and every cat is different.
How did LB's stay in the cattery go? I picked Max up from the Cat Clinic on thursday and although it was ridiculously expensive I am happy with the care he got while he was there. Max has never been well regulated and has always been a bit all over the place with his BG. They did lots of dose changes to keep his BG under control - he was on 2.5u when I left and they increased right up to 4.5 and then he was down to 3.5u when I picked him up. Although he didn't get to come out of his cage much he seemed to be much less attention starved than usual after a stay in a cattery. When I picked him up the girl at reception said he was beautiful and they took quite a while to bring him out - she explained they were all having there last cuddles with him. I emailed a few times while we were away and they kept me updated as to how he was doing. Since he has been home he has had better and more consistent BG numbers than ever so hopefully that continues. Its never easy to leave him when I go away and this was the first time I have been away since he was diagnosed but I think its all worked out ok. Now he's trying his best to re-establish himself as the master of the house and seeing how high he can get us to jump :lol:
Anyway, thought I'd see how LB went with his stay and let you know how we went.
Cheers,
Amy