
I bet you are angry , I would be too , it sounds like your niece has made up her mind no matter what!
I have a very healthy but now old and weak shar-pei he is over 12 years old now. We have been extremely lucky as he has had no other health problems other than ingrown lashes when he was a pup. He had the entropian operation and we've never looked back since.
I know a breeder who shows and has bred shar-pei for over 25 year and she has had a lot of trouble trying to rule out the health problems with the breed . Her lines are quite good as I understand but she has not had a dog live past eight. When she told me this I couldn't believe it. I feel very lucky.
I also know a man who has a shar-pei with FSF and she suffers quite badly , he is always at the vets for treatment. Poor girl I feel for her when her hocks are all swollen up. But he took her on knowing she had the condition and he looks after her well and when she has an episode she gets her treatment straight away.
I do hope your niece does the right thing .