Many travelers know them for roaming around sniffing for explosives before passengers enter the airport security checkpoint.
They're the Transportation Security Administration's detection canines.
National Dog Day is August 26, and to celebrate the TSA dogs want a bite of the action.
They want you to vote on which of their pooches will receive the coveted, cutest canine award.
The participants are, Kajla from Daniel K. Inouye International Airport, Djanni from Phoenix Sky Harbor International Airport, Lexa-Alexey from Dallas-Fort Worth International Airport, and Ron from Oakland International Airport.
On August 19, Kajla will go against Djanni. Then on Thursday it's between Lexa-Alexey and Ron.
The winners will go head-to-head on August 21, with the winner being announced on National Dog Day.
So how do you vote? Well it's simple, just go to any of TSA's social media platforms including Facebook, Instagram and Twitter.
Each pup was nominated by TSA handlers from airports around the country. The agency currently has 1,000 explosives detection canine teams deployed nationwide.
So if you're traveling and see these working dogs, TSA says feel free to say hello, but please don't pet or feed them.