"I thought about it the whole day. It was like pulling at my heartstrings because it's cold and he doesn't have any muscle. I mean, he's literally skin and bones," he told news station KOCO News.
"This guy, you can see every bone in his body. I mean, all of his ribs, all of his skeletal bones, it's obvious. He wouldn't have made it through the night. Or I didn't think he would. And I couldn't leave him."
With two dogs already at home, Eastwood wasn't able to take the frail pup back to his house, so he did the next best thing - he put him in the hands of animal rescuers. The dog will be placed in foster care as he awaits adoption with the help of The Bella Foundation, a local nonprofit that finds homes for displaced pets.
Sadly, no one ever came to claim the little dog, raising suspicion that he had been abandoned. If that is indeed the case, the work of law enforcement in this case is not yet done; authorities say that the owner, if found, will be charged with animal cruelty.