There are really just too many missing details to make a call on this one. It's hard to see who might be right or wrong without knowing all the facts.
Personally, I do think the girl should probably be allowed to have her dog. I tend to agree that specialized support animals really aren't on the level of anything that could possibly be considered a pet, the training and conditioning that goes into an animal like that, it would not be a problem beyond the shedding, and it doesn't even say what kind of unit they are in, if its a townhome, how is the dog shedding in the home almost exclusively going to affect anyone else's allergies? Like I said, just too many missing details.---EDIT nvm it did say it was an apartment building, yea, I could see some issues with that coming up.
But, I have to say, sort of similar idea, disabled man in wheelchair lives in a no smoking unit. No problem right? What happens when/if he gets prescribed medical marijuana for severe pain (say he was disabled in an accident, spine completely shattered or something, while he lived in the unit). How many of you who have said this girl shouldn't be allowed to have her dog (even if it was prescribed as a neccessity on the same level) would boot this man from his apartment? He has no way to afford higher rent, hes in a wheelchair, little to no mobility, he can't just go to a buddy's house to smoke up, and he might not be able to afford an increase in rent to cover any extra cleaning costs. Should this man also be booted from his home? or forced to find a new place to move, when he obviously wouldn't be able to actually complete the move, or afford it? Or is there, sometimes, points when the rules can be bent in extraordinary circumstances? Just for a little deeper debate on the issue/some insight.