Trick or treat! Who says humans get to have all the Halloween costume fun?

In honor of the season, we searched the web for the most adorably festive four-legged friends. These cute little critters are sure to put a smile on your face and get you into the holiday spirit!

1. Captain Scurvy Dog

(via Cute Overload)

2. Skunked.

(via Flickr)

3. These supereheroes are ready for action!

(via NedHardy.com)

4. Who is the fairest of them all?

(via WeHeartIt)

5. Scuba time!

(via Politics as Usual)

6. Darth Kitty

(via Costume Craze)

7. And of course, Pug Princess Leia

(via  Podpocalypse)

8. Shark attack!

(via Instagram)

9. Going on safari?

(via Etsy)

10. Cat Bunny

(via 1039rxp.com)

Do you have any adorable pet costume photos? Tweet them @ModernMom with the hashtag #CutePets and we’ll add them to our list!