From getting you outside for daily exercise to helping you cope with a disability, there are many ways a dog can be a superhero, and PetSmart plans to turn three such super pooches into comic book stars.

German Shephard in Hulk T-shirtThe pet retailer wants to recognize the heroic characteristics of every dog, so in honor of its new Marvel and DC Comics pet collection, it's hosting a dog superhero photo contest.

To enter, submit a picture of your dog on PetSmart's contest page. Be sure to include an explanation of why your powerful puppy or courageous canine is a superhero to you in 100 words or fewer. Entries will be accepted through July 24.

The top 10 photo entries will win superhero-inspired pet gear. Fans will then select three grand-prize winners to receive drawings of their dogs, which will be done by an official DC Comics artist.

dog in Wonder Woman dressPetSmart will also donate $5 for each entry up to $20,000 to PetSmart Charities to help save homeless pets in the United States and Canada. The donations will be put toward spaying-and-neutering and adoption programs, as well as emergency relief efforts and other animal-welfare programs.

The Marvel and DC Comics pet collection features a variety of T-shirts and toys that can be found exclusively at PetSmart.

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