The Petco near me has bonito flakes in their Treats section - BOY do they smell! And they were the bridge from "don't put that canned food in front of me, it's got icky medicine in it, I just know it" to "Hmmmm, maybe I'll try this stuff after all" for my Smudge. Try adding bonito flakes to Muskrat's favorite mushy stuff - they're apparently irresistible...