I don't know anything about this I'm so sorry you may need to call the airline
WOW THATS A GOOD QUESTION...I DIDNT SEE ANY OFF HAND THAT CAUGHT MY EYE..SO YOU PROBABLY GOT TO ASK..BECAUSE I DID SEE PEOPLE WITH THEIR PET..
Best would be ask United team.....
Terminal A has a small doggie park lower level pickup and dropoff area not sure about other terminals.the area fenced in well kept lawn.
I have no idea, sorry.
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