[New2This]

I'm reading this with Latka from Taxi voice running through my head.

There's a whole thread about service animals on the site. What Kawiz said is right. Decline a service animal are you are up a certain creek without a paddle.

If I read this right, you're borrowing someone else's car to do Uber? I pray to (insert appropriate deity here) that you or her have the right insurance...

 

[New2This]

I would absolutely refuse despite the fact it's a service dog, sorry. What if you are legitimately allergic? Are you supposed to dismiss your own health for the sake of discrimination?

According to the thread about service animals, their need for the service animal trumps your allergies.

Best bet is if you're allergic, cancel have them order another Uber & wait with them until other ride arrives.