I got Lulu at almost eight weeks. I took off ten days from work to settle her in. Never had any problems with her healthwise and she was well socialized which I continued. She took to her potty training well. Zoey I got her at almost 5 months and I have been struggling some with her potty training.
I know it's not good and I was fortunate. I think you can evaluate each situation on a case by case basis. JMO so don't bring the heat
. Just simply stating my thoughts on it. I can see the need for there to be a minimum age that breeders should allow the pup to leave the litter.