We don't know what bread the dog is, it could be a mixed breed, the OP doesn't say. The dog I had pts recently at 13 came from an online ad and he was completely free. He was a mixed breed and he wasn't getting on with the resident dog , they kept fighting and the owners were scared their kids would get caught in the middle. I took him on and for 13 years he was a great dog, he needed training and he got it but apart from that he was a great dog. Rescues are full of dogs needing homes and some people would just rather know who their dog is going to.