well I would say breeders who have kept puppies from a litter would be more the ones who have been with puppies since the first day.
The earliest I spent time with one of mine was when they were about 3 weeks old, it was Dodge who has since passed, my heart dog, he turned out to be everything I ever wanted in a german shepherd.
Danger Danger vom Kleinen Hain aka Masi
"Angel" Jakoda's Bewitchen Sami CD OA OAJ OAC NGC OJC RS-O GS-N JS-O TT HIC CGC
"Angel" Steinwald's Four x Four CGC HIC TT
Harmonyhill's Hy Jynx NA NAJ NAC NJC RS-N JS-N HIC
Jakoda's Jagged Edge