My 10 month old puppy yorkie was diagnosed with Patellar Luxation in both knees. She gets around good and doesnt act in pain, yet. But I can definity feel the knees come out of place when i move her leg. I had a suspicsion when I would sometimes hear her leg making a cracking sound (just as if you were cracking your knuckles). So I brought her to the vet today to get a health exam and to have him check her knees out. Right away he told me she had it

I am very sad for MiMi for her condition, because even if it doesnt hurt now, it will eventually right? I am still doing research on it.
Okay, so heres the question...the breeder does health guaruntee her pups for one year. But I am suppose to ship her back in order to get a new puppy. I am very attached to MiMi and so is my husband, I love her personality and I would rather just turn in her AKC papers over to her and spay her and deal with the possible surgery later. I really dont understand why anyone would want to take her back in replacement? I am going to call her first thing tomorrow, but I am curious of why a breeder would want her back. What would they do with her? Also, would it be a bad idea to get a replacement puppy? Thanks for any inputs!
Marie