The only thing I can suggest is to really pay attention to amount you are feeding, activity before and after feeding and see if there is any pattern.
Val da Tiger
Fuzzybutt the cat.
RIP Cheyenne - AKA: Digger, CheyChey Girl, Cheyenne Large and In charge. 2/16/02 - 2/27/16
RIP DeeDee - AKA: DD Poo, Little Bit, Binky (part of the Binky and Booboo team) 6/23/02-6/20/11
RIP Lakota - AKA: Bubba, Big Boy, BooBoo (the other part of the Binky and BooBoo team). 1/19/03-9/19/2011
RIP Raya - AKA: Raz-a, Ray a Sunshine, RayBestos, the little one, Silly Girl. 9/21/05 - 6/27/14