KEWL!!
u guys r so inventive!! I never would have thought to put YOGURT in the middle!:P what i do, is my dog oscar LOVES alpo cheew-eeze they r good 4 his tteth and keep him happy and busy! well, any way, he is also a BIG fan of peanut butter. so, I smear peanut butter along the treat, and put bits of meat, treats, buscits, or even KIBBLE on it, and it occupys him 4 hours! but always makesure they have access to water, if the kong or treat contains peanut butter, as it tends to make them thirsty!:o