Thanks for the suggestion, Loki! I do keep the cats on a schedule, and have been very meticulous on portions. I'm a big fan of Acana, so I really didn't want to change, but...
I will be sure to check out your links, sugarcatmom. The cats have been resistant to wet food so far, but it's worth a try, oui?
Thanks again! If anyone else has any thoughts, I'd love to hear them.