I do! You've been given some good links and I'll add another of my favorites
The Many Myths of Raw Feeding
I typically feed all kinds of chicken and beef heart. Sometimes I feed chicken gizzards and hearts too and I try to add in some variety with pork or fish (mine don't really like fish) And sometimes I cheat and feed NV or Primal and when I do, I always feed something I can't really get like buffalo or venison. I feed 2-3% of their adult weights and at first I measured it but now I just eyeball it. I weigh my dogs every so often and tweak the meals based on whether I think they need to lose or gain weight and I use a scale just to keep it in perspective. Hope that helps....