Police rescued a dog that had been shot in the leg and left tied up on a 20-pound chain, and now Charleston Animal Society is offering a $2,500 reward for information leading to the arrest of the person who did it.

"It's unfortunate and sad that we receive such a large number of dogs that have been shot or chained and starved," said Charleston Animal Society CEO Joe Elmore. "We're committed to saving each and every one of them and bringing every perpetrator to justice."

Charleston County Sheriff's deputies found the dog and two puppies at the location in Adams Run and brought them to the Charleston Animal Society on June 15. None of the dogs had access to food or water, and neighbors said they didn't know who they belonged to, according to the shelter.

Charleston Animal Society veterinarians had to amputate the shot dog's right front leg. He's been named "Roscoe."

The two puppies have been adopted, but Roscoe will continue to recover at the shelter before joining a foster family and eventually a permanent home.

"He's in there wagging his tail and licking my hand and everything," said Elmore. "He's going to be fine."

An animal cruelty investigation is now underway, and those responsible could be charged with felony animal cruelty.