[princess chloe]

I am going to start from the beginning.....My neice bought Chloe,she is in college and didn't have enough time for her. I took her,fell in love and the story begins.... I noticed Chloe limping,took her to the vets after a month of back and forth,she had surgery,she had legg-perthes.I took her back to the vet on Saturday to get her staples out,told the vet I was worried because she wasn't using it.They examined her and said her knee cap was moving and crunching when they moved her leg!! How could this be?? She just had surgery the 27th of October. Does this just happen? They didnt really answer me,could they have done it? She is the first Yorkie I have ever had and I love her,but I think she will be my last.I can't take this heart ache!! She is only 15 month old and she is going threw too much already! Does this have anything to do with the breeder??? Sorry this post is so long,I could really use some advice!