Once they really get the command you can start backing off on the treats. For training treats you want something pretty small that doesn't need to be chewed. When I'm going to be training I mix bits of hot dog, freeze dried liver and kibble. I like using a mix since I can either save the really good stuff for really good behavior or rotate them so the dog never knows which he will get next which can make him work harder.
For brand I use a lot of single ingredient freeze dried treats. Ex liver, chicken,turkey. My current dog has a pancreas condition and can't handle most treats so I try to stick to limited ingredients.
For other dogs usually the stinkier the better lol. I'm a big fan of Zukes treats.
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