Ground bison would be a great option if you can find one that isn't super lean (90% lean or less). Otherwise, the meat tends to try out if there isn't a higher fat content. I am a huge fan of ground bison. You can read more about the benefits in my Bison Bolegense recipe post. Otherwise, yes, you CAN substitute chicken or turkey, but I do not recommend it as you will not get the same rich flavor that comes with beef (or bison).