Was she dumped by the breeder or by the person the breeder sold her to? Sometimes it isn't a matter of the breeder wouldn't take her back. Sometimes it is a matter of the owner didn't bother to take her or send her back or even contact the breeder.
Some people when they make the decision that the dog has to go, they divorce themselves from the dog. Once they decide they are no longer going to keep the dog, they do not care what happens to her. They will not drive 100 miles to get her back to someone who cares, when they can dump her at the shelter in the next town.
Someone somewhere did not care about your dog. It could have been her breeder. It could have just as well been someone she was sold to. The breeder may be faulted for selling her to someone like that, but breeders are only human, and sometimes, there is just no way to ensure a person is going to act 100% perfect in the future toward the dog. You can put things in place, like right to first refusal, but you have to know that the person dumped their dog. Breeders do not have a micro chip in the dog that sends and SOS to their computer when the dog's owners are thinking about dumping or selling the dog.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC