I am sorry, but I don't have any advice that hasn't already been said. However, I do know the person to talk to about this.

The person that Tubby & Peanut's Mom was remembering was Craftlady. Her kitty Skinny had issues like Brambles.

You may want to PM her. She went through alot of things before they hit on something that skinny could eat. She will definately have some ideas on the subject. I hope this helps.

Here is the thread that se posted when Skinny started to show signs that they hit on the correct combinations of food.

http://petoftheday.com/talk/showthre...threadid=38361

Well I will be praying for Bramble and sending good thoughts to all.