On Monday, the ticks were all plucked away, one by one, and Collin was washed clean from his dark past - a past that saw him abandoned on a street corner in Miami, Florida.
In fact, when he was first spotted by a passerby on that corner, it seemed that he had already given up. He simply lay panting in the grass.
"A Good Samaritan saw the owner put the dog out of the house and into the yard," Grace Lofton Kaye, founder of Their Lives Matter, tells The Dodo. "When the person asked the owner, the owner said the dog was ill and full of fleas and ticks. He just kicked the dog out of the house.
But that Good Samaritan took pictures and posted the dog's plight to Facebook.
And when Kaye saw the post, she couldn't look away.
"I just combed the thread thinking, 'Oh, someone probably already saved him. But it was unfolding in the moment," Kaye says.
Then she called a veterinary hospital asking if they could help.