The healing power of paws. (Facebook)

16-year-old Anthony Lyons is battling acute lymphoblastic leukemia, and currently receiving treatment at Phoenix Children's Hospital. A bright spot in his days is visits from therapy dogs.

"It really helps, the pet therapy," Anthony told Fox 10 Phoenix. "Like I can be in here having a really bad day and then one of the dogs will show up and it will be the highlight of the day."

But since dogs can't visit all the time, a family friend set up a Facebook page called Photos of Doggies for Anthony. The page quickly went viral, with over 300,000 people from around the world posting photos of their cute, funny, and cuddly pups.

Sources: Business Insider | Fox 10 Phoenix