10 Senior Dogs Who Have No Idea They're Old

Athena, an 8-year-old Labrador Retriever, looks like she's having the best day ever at the park.

Ted, an 8-year-old mixed breed, spends plenty of time socializing with friends.

Need a study buddy? Bouncer, an 8-year-old Yorkshire Terrier, keeps his mind young by helping his owner prepare for his Master's exam.

This 8-year-old Shih Tzu, Gizmo, doesn't cut corners when it comes to exercise: He takes the long way home on his walks.

What a smile! Bruiser, an 11-year-old Boxer-Pit Bull mix, always has his tongue sticking out.

Who's ready to go on an adventure? Fezzic, a 7-year-old Australian Shepherd, loves backpacking.

Don't even think about taking the ball away from Brinkley, an 8-year-old English Cocker Spaniel. He's kind of obsessed.

Gunner is an 11-year-old chocolate Labrador Retriever who prefers to spend his time exploring rather than sitting at home.

We should all aspire to be more like this 8-year-old Chihuahua named Charlie and remember to stop and smell the flowers.

Murphy, a 7-year-old mixed breed, seems like he'd be an excellent personal trainer.