She's a French bulldog. If you use a reputable rescue they will tell you all the about the dogs personality and habits, and offer a trial period. In So Cal there is a boarding company that offers trained dogs for the disabled and they cover food and vet bills for life. There is also a place that offers small service dogs for no charge. Even your local pound should offer a 30 day trial, though they often will offer a pet exchange, not a refund.
My mom adopted my dog from the local pound, and then allowed me to have her since we bonded so well. She even licks the exact area where my pain is worst when I'm flared--very odd! The good news is it doesn't cause me pain, and I'm very hypersensitive.
Amusingly enough my mom is convinced I'll meet a guy when I'm walking her...
I'm still voting for an RSD cruise or vacation to somewhere warm where we can all swim. If we want to prohibit the married folks, that's fine by me!