People often take to treadmills to get in a little exercise, and with the obesity epidemic spreading to our furry friends, sometimes our dogs and cats do too. But pets don't always need a specialized treadmill when one of the human variety works just as well. Take a look at a few curious cats and daring dogs who decided to change up their cardio routines on the treadmill.

Running with the 'purrfect' partner

Along for the ride

This cat hates to exercise.

Are you cheating?

What is this thing?

A dog with 'spring' in his step

2 cats

How many dachshunds can you fit on a treadmill?

Cat vs. treadmill

Dog days at the gym

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