i was paranoid about this too when getting my one baby...
i flat out asked the breeder how she tells them apart and how i would know i got the puppy i was supposed to ... she is a great breeder and was not at all offended by my question (which says a lot IMO)
she also made me videos and sent me pics allllllll the time so i saw him growing up and i knew i got the baby i was supposed to
