There aren't many greeting cards designed specifically to give to a pet sitter. But the NobleWorks Pet Sitter Thank You Humor Card is one of them, and one of the best. A cute collection of fun-loving, furry dogs are gathered to woof out a big 'Thank You To A Great Pet Sitter.' A beagle, german sheperd, chow, boxer, dachshund, chihuahua, and more mutts adorably send out your gratitude to one woofer of a pet sitter. Doggone great gratitude!