I have been feeding Prey Model Raw for about a year and a half! I attempt for an 80/10/mix as someone else stated above. I will caution that if the poo is white it does mean your bone content is a little high. Remember it's mostly meat with a little bone. If you have a high content of bone in one meal then the next day you might want to feed some kind of boneless meat. My yorkie is super healthy and has a great coat, nice teeth and she only goes poo once a day usually and it's at 1/2 the size of when she way fed kibble and going 3 times a day! And I spend less than when I fed kibble too!
Here are some great links:
THE MANY MYTHS ABOUT RAW FEEDING RawChat : Raw Chat
Good luck!