Some one told me when i was a kid that reg. dogs were harder to raise than grade dogs. I remember also when i was a kid that most everyone owned some kind of mixed breed dog or a old hound or two to hunt game with. People let them run loose as yard dogs for the most part. On occasions a female would come up pregnant and when she had pups it was usually under the floor. The pups were left alone and the mother was feed when she came out from under the house and came to the back door. Their were no 7 way or 5 way or 8 way shot's back then in my area at least and if a dog got wormed it was by a home remidy of some kind. Well when the pups were old enough and moving around good the mother would bring them out and i don't think i can recall any shy ones in the bunch and if their had been a weak one in the litter nature would have taken care of that too. Now breeders do every thing in their power to save the weak pups even though from some inner instict the mother keeps kicking it out of the bed. We start giving shots at a early age and i've seen adds where a seller has pups forsale at six weeks old and all shot's given. Makes you wonder how things of the wild like yote pups ever survive. I think down through the years man have made animals like dogs weaker by their over care for them and now we have no choice in the matter but to continue what were doing to get them to survive.