Hi and welcome from a fellow Arizonan! Its a great forum here, and youre gonna love your golden. Is he/she coming from a local rescue?
No, he is a 'release dog' from a service dog school. He was released because on his second in-depth physical, they discovered mild hip dysplasia, and when he is 8-10, he might not be able to brace someone from falling, or pull a wheelchair. I am told that he is asymptomatic, and with his level of HD, he might go his whole life without a symptom. I'm crossing my fingers!