What I have found for treats is dehydrated organ meats. Never saw a dog turn one down. Something about dehydrated meat makes them crazy.
I go to what I call a spanish grocery store and buy pork hearts, kidneys, and throats and regular boneless chicken breasts. Cut them thin, like 1/4 inch thick so they get nice and crunchy. Put them in dehydrator and let them "cook" takes a couple of days depending on how close together they are put. When you check them if they still look shiny they are not done. Once they are not shinny move them around with your hand, if they stick they are not done, if they come off easy they are ready.
I actually have to hide the bags of treats from my girl, she knows how to open the bags and help herself if they are within reach. These are also good for training as you will find they will do anything for a treat