Not sure about dog issues, but here's a few of my suggestions based on more trips to DTT and PDR than my bank account liked... .
At the booth, shut your truck down RIGHT NOW! Try for a 300 degree turbo cool down, and it'll all be downhill from there.
Take off your sunglasses.
Picture I. D. (drivers license), and passport, or certified copy of birth certificate... not just a photocopy of the original.
Sometimes they hardly want anything, but be prepared for the worst, and if you get a snotty one, bite your lip and be nice.