Dog owner posts heartwarming slideshow of 3-legged dog who overcame the odds

A dog owner posted her three-legged pet's story online and it is quickly going viral.

According to a slideshow on Imgur uploaded by user Rumpleteazer, three-legged dog Mister was "found in a barn with a shattered leg that couldn't be saved."

In addition, Rumpleteazer notes that the dog had pellets underneath his skin after he was shot with either an air rifle or a bb gun.

In a series of heartwarming photos, the dog owner details how Mister overcame the odds, including heartworm, to get to where he is today - happy and healthy.

In just 20 hours, the post has racked up more than 150,000 views and hundreds of comments.