Cosmo

"What do you let him lick you like that for? Gross!"

- Howard the Duck to the Collector

Cosmo is a dog, resident to the Knowhere mining colony.

Biography
Cosmo was a specimen from a U.S.S.R. space program being held in Taneleer Tivan's museum when the Guardians of the Galaxy brought the Orb to him. In the subsequent battle between them and Ronan, Tivan's assistant Carina unleashed the Orb's power, destroying much of the museum. Cosmo managed to survive the catastrophe and escaped. However, shortly afterwards, while Tivan sat in the ruins of his museum, Cosmo returned to lick his face, as Howard the Duck commented.

Trivia

 * In the comics, Cosmo was a test animal of the Soviet Space program. He was launched into Earth's orbit as part of an experiment in the 1960s but drifted off into space. He later arrived on Knowhere and became mutated, gaining telepathic and telekinetic abilities.
 * In the comics, Cosmo and Rocket Raccoon have a very uneasy relationship. This is referenced in the film when they growl at each other as the Guardians enter the museum.