The moment Sam told Frank he was adopting him!
The bandana is from Hanks, a local restaurant (there is no Austin restaurant named Franks unfortunately)
He did eventually get a treat (three treats)
About Frank
Frank is a half Husky/Malamute and half American Bully who was adopted in March 2020. The vet's best estimate is that Frank was born in Jan 2019. Frank is one of the few living beings born in Austin that Sam knows. His personality is very much in line with what you are assuming (correctly) is his nickname, Frank the Tank. He also goes by Big Man. He was not named after Franklin Barbeque.