1 1 LINKEDINCOMMENTMORE

Tampa, Florida -- Dogs are more than man's best friend. They're the ones we look to for a pick me up when we're down. And for one therapy dog, she's not just a healer, she's a survivor.

Holly makes regular visits to Moffitt Cancer Centerto cheer up patients and her joy is contagious.

A rescued golden retriever, Holly is one of Moffitt's most popular pet therapy dogs. She's a cancer patient herself. After living on the streets and ending up in a shelter, a rescue took her in before Kelly Pavone adopted her in June 2009.

A few months after she was adopted, Kelly noticed Holly wasn't acting like her usually self. Tests revealed she had cancer: seven tumors in the lungs and one in the breast. Kelly found a clinical trial. Now, after undergoing a new immunotherapy, Holly's cancer in her lungs is stabilized.

The vaccine is showing promise. It will be used in human clinical trials this year at the University of Nebraska Medical Center.

Photojournalist Angela Clooney shows us how Holly's empathy for cancer patients comes through her paws as "the walking smile".

Click here to check out Moffitt's therapy dogs on Facebook.

See how Sadie is making seniors smile.

You may also like...

Weird Florida:A look back at some of the strangest stories of the year

Miracle Baby:Tampa toddler has 5-organ transplant

Broke Bad:Contest winner busted in synthetic drug ring

Here kitty, kitty:Lion escapes enclosure at Pasco sanctuary

Fake Cop:Man arrested 3 times for impersonating officer

Animal tragedy:Girl's miniature horse attacked by dogs

#ShortYellows:Florida quietly shortened yellow lights

Kittens shot:Officer shoots kittens in front of children

Popular photo galleries:

Faces of Meth:Devastating before and after photos of meth abusers

Trayvon Martin Shooting:Trayvon Martin crime scene photos and George Zimmerman injury photos

Hooters Winners:Winners of the 2013 Hooters swimsuit pageant

Rejected:Funny Florida license plates rejected by the DMV***warning graphic***

Deadly sinkhole:Home collapses, man dies in giant sinkhole

Popular Databases:

Florida Sex Offenders:Look up sex offenders in any Florida neighborhood here

Restaurant Inspections:Look up inspection reports for any Florida restaurant here

1 1 LINKEDINCOMMENTMORE
Read or Share this story: http://on.wtsp.com/N8rVLz