Whatisloveanyway, sounds like love is a new puppy!
A tip from our experience with our girl pup, she was one of 12, and we chose from among the remaining litter of 5 identical looking little black GSDs. One of the others that came twice up to me as I sat on the puppy cottage floor had needle teeth she had no hesitation using on my wrist. As this breed is a serious guarding dog, I had some reservations whether I was up for the job of raising her! Then her slightly smaller sister crawled up in my lap like a kitten, didn't offer to bite, and like you, I was charmed! Her breeder held her up and asked me if I wanted "This puppy?" (I felt it was her pet of the litter). I broke down crying as I felt I was making a huge life decision I didn't 100% feel certain about...until puppy girl, in her breeder's arms, let out one of those puppy grunts as she looked down at me and I found my mouth saying "Yeeeeessssss" through my tears. So she picked me, I felt.
Fast forward through our raising the little girl dog: we knew she was the smallest pup in the litter, one of 12, but I never realized bitches can only nurse 10 pups at a time, so the breeder must have been bottle feeding her from birth - no wonder she had a bond like that with the baby! Raising a dog who started life as a Bottle Baby has been...interesting. She is very baby-like, even now at age 9. Plays puppy games to get our attention, etc. That is what we got.
Now the shelter pup I saw this morning did NOT look much like a Labrador Border Collie mix, even at 8 months. Bones too delicate, tail curled right up over his back, I think more like a Jack Russell terrier cross. The lady told me it came from a puppy store in a nearby town, supposedly bred locally by Mennonite farmers, but she herself didn't think it looked like any Border Collie mix. Plus she warned me he plays rough, bites the other dogs, etc. But he did calm down as he noticed we stood there for a few minutes, and finally did a "sit." They're all so precious, it's a sad thing to see.
The lady we adopted our old boy from in 2010 now manages the shelter. She said we gave him a great life and never gave up on him. And just while I was there, somebody brought in a pit bull with the excuse "no time for him, any more..." The lady asked if it had bitten anyone. "Not sure..." Still, I felt sorry for the poor dog, he'll just be another whose people gave up on him.