People are usually the ones turning into memes, but they aren't the only ones. Four-legged creatures of the domestic variety, especially take-no-prisoners cats, are also prone to fame and recognition.

Here are three of the most popular pets who have claimed Internet stardom.

1. Grumpy Cat: Grumpy Cat is the screen name — if you can call it that — of Tardar Sauce, an Internet celebrity who happens to be a Snowshoe Siamese cat. Her permanently grumpy expression is due to an underbite and a case of feline dwarfism.

Grumpy Cat has starred in several hilarious memes. And now she has some serious competition in the form of Grumpy Puppy.

2. Boo the Dog: This short-haired, smush-faced pomeranian is the cutest dog on the web. 17.3 million people on Facebook certainly think so, and it’s hard to disagree with them. Just look at him!

3. Chris P. Bacon: This adorable pig was born with a deformity in his hind legs. He became famous when a YouTube video of him learning to use a makeshift wheelchair went viral.

These are not the only animals famous online. You can also check out Maru the cat, Menswear Dog, and Cooper the photographer cat. And remember: two legs good, four legs better. That’s the way of the Web.

Which four-legged Internet sensations are your favorites? We’d love to hear about them in the comments.

Image Credit: Couple of cat taking a selfie together by FotoYakov via Shutterstock