I like to get several different flavors and mix them in my pocket. Curiosity about what flavor they'll get next helps keep my boys interested in the treats. Right now I have a mix of ordinary Purina lamb and rice dog food, some Purina salmon cat food kibbles, CloudStar soft liver flavor, Zukes peanut butter flavor, VitaEssentials Duck Nibs, and VitaEssentials Turkey giblets. String cheese is good as a high value treat if I'm able to use it right after I unwrap it. It's a bit messy to keep in my pocket. I have tried using bacon as a treat, but it's too high value. The dogs lose their everloving minds and can't concentrate on the actual tasks.