Hi, OP here...
Just wanted to clarify that my fat cat gained part of her extra weight before the Orijen (she ate Nutro Natural Choice for her first 4 years). She's also a solo apartment cat that doesn't get much exercise...
So if your kitty has different arrangements, Orijen is a good food and might be fine.
OH, and thanks for the toy suggestion - sadly Luna has a thing for elestics in a BIG way. She's not interested in the toy on the end except as something to hold while she chews through the elastic! So no more of those for her. :shrugs: