Yesterday I got a letter from the breeder. She relayed that the owners of two of his littermates reported no signs of any problems. One of Kirk's littermates is also in our puppy class, so we have let them know as well.
She also included a check...she refunded his purchase price to the dollar. It will really help with the cost of surgery. Looking at the date on the check I see she wrote it the same day I called her to let her know about his hips. She offered a full or partial refund over the phone, and I was thinking of asking the next time I called her for at least the partial refund, but I'm glad she made the decision for me. I will have to think of something really nice to do for her. I should also e-mail her some of his recent pics!
I will call her tonight to thank her and let her know about his upcoming neuter.