DOUGLAS COUNTY, Colo. (CBS4) – A police German Shepherd tied to a post and left to die was found Thursday morning just hours from death, severely dehydrated and 20 pounds underweight.

“I literally thought he was near death,” the dog’s trainer, Marie Pauciello, said.

Alonso, who is being treated with IV fluids, is the second of three missing dogs that’s been found since 13 were intentionally released from a kennel in Larkspur on Saturday. Ten of the dogs were found nearly immediately. The first missing dog was recovered Monday. The third dog, Dux, is still missing.

“The condition that (Alonzo) was in and the severity of the dehydration, I don’t think he would have made it another night,” veterinarian Jan Jensen said.

Authorities are searching for suspects.

“You have no soul to just tie a dog out somewhere and just leave it,” Pauciello said. “It’s heart-wrenching and gut-wrenching to think that Dux, who is one of the sweetest dogs we have is out there somewhere and we don’t know where.”