Thanks for posting this. It is surprising the number of people on this forum that get puppies prior to 8 weeks. On the TV show, Too Cute, there was a GSD family that kept the pups with the mom until 12 weeks and exposed them to many things. I wish my pup went through something like that.
We had kittens abandoned at our business, I found them at 5-6 days old and even though I was able to raise and bottle feed them, there are many things they missed not having a real cat mom around to teach them. The babies really do benefit from being with mom and siblings.