I've not been told about the phosphorous/calcium ratio, so, I'm going to research on that topic, too. But, yeah, I mean, I've been told the whole purpose of homemade diets is to more simulate their wild cousin's diets, and, puppies of wolves and foxes, after they are weaned, don't get special puppy food, so, I've always been told to get them off of processed dog food as soon as possible. I'm still interested in the pros of feeding processed puppy food, though. I'll keep an eye on this post for any answers.