Maybe I should get a stuffed animal at the State Fair.
Good suggestions all, thanks.
I'll give myself some suggestions:
Talk to the Control officers and people who actually feed, water and care for them. The front desk people usually don't know the dogs for more than a passing glance, the people who interact with them do.
Check the new arrivals, they may not be up for adoption yet but be might be a candidate there.
Quarantine also, if they will let you back there. Purell your hands, shower and wash your clothes before greeting any other pets of your own and work the Quarantine area last at each visit.
Bother the Vet and ask any questions as a last step before electing to bring the dog home. Sometimes, they have insights that others won't.
Ok, what else that hasn't been said?