choose a different breeder. breeder should not be having anyone "visit" puppies who are only a few weeks old. and you must mean akc "registered", there is no "certified", and registration means nothing except that both their parents are registered (hopefully, registration can be fake). imho, it's also foolish of the "breeder" to bring dogs out on leashes, especially a mom with new puppies, into a situation where there are children present. and again, imho, there are no "one family dogs" only dogs with sound temperments and dogs with unsound temperments. good for you for coming here and asking questions...can i suggest that you might want to think about a young adult rescue shepherd, whose temperment suitability for children you could judge a bit better. puppies, no matter how well bred, are an unknown...you never know what they're gonna grow up to be, especially if the breeding wasn't done by a very reputable and knowledgable breeder, and even then sometimes...
mind if i ask where you're located?
mom to seraphina blue & the cashman
miss jeni-take-a-ride, rescued 7/07
shangri la's great white caesar, rescued 4/09
hearthside's cinderfella (RIP 4/20/09)
shep von bellefontaine (RIP 6/9/10)
voodoo lily (dsh) & cricket (african grey)