Video: Why wet dogs stink (and other canine chemistry)

They're our best four-legged friends, and they're the stars of many an Internet video. No, not cats. This week on Reactions, we're talking dogs. We investigate the chemistry behind your dog's amazing sense of smell.

We also explain why Fido stinks even after he's had a bath.

Also, have you ever noticed that dog food smells gross? There's a reason for that.

Check out all the canine chemistry here: