The AKC does a nice job hitting the nail on the head with this post, it's a good read for new owners and breeders alike. Below are some quick points they bring up, all of which are 100% true within our program here at PhogHaven Cane Corso:
"As a new owner, you may feel that once you've purchased the puppy and brought him home, the breeder has done his or her part and now you're on your own. Not so! Responsible breeders care about the puppies and are interested in hearing what's going on with your dog, good and bad."
"By staying in touch, you're sharing information that's valuable to your breeder. He or she will want to know about any temperament, health, or other problems your puppy has in order to make future breeding decisions. The breeder cares about breeding the healthiest dogs possible, and input from you is important."
"In rare cases, your life may change in such a way that you can no longer keep the dog. In this case, it's essential that you contact the breeder. Any reputable breeder will be willing to take the puppy back, even in his later years."