Someone may have suggested this already, but I will throw it out there. All ethics about breeding put aside.....You most likely have a contract that says exchange of a puppy not your money back. So, can you or would you be in a position to ask the breeder for a new healthy puppy and keep this one too. The breeder will most likely euthanize her if you send her back, so it is a win win for you and the puppy. But, you are obviously also entitled to a healthy puppy.
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