I feed PMR or Prey Model Raw. I find that it is actually less expensive than what I was feeding before but this is because I tell all my friends not to throw out freezer burnt meat and I ask hunters for donations so I actually haven't had to buy food for my dogs myself in about a month. But it's not for everyone but if it interests you, this is a really good thread about it....
http://www.yorkietalk.com/forums/yor...odel-diet.html