Police are searching for someone who dumped a bulldog inside a garbage bag in Iowa.

Police are trying to figure out who taped a bulldog inside a garbage bag and abandoned it in Des Moines.

The emaciated dog was found near a railway bridge on Tuesday afternoon, with its head sticking out of a black plastic garbage bag. The dog was unable to walk because the bag was secured with tape.

Police spokesman Sgt. The man who found the dog said the bag caught his attention because it seemed to be moving, Paul Parizek said in a statement.

Parizek said Saturday that the dog is slowly recovering. When the dog was found, he weighed only 23 pounds (10 kg), according to the veterinary staff caring for him.

Investigators are hoping someone will recognize the dog and help trace it to the person who abandoned it.

Police said the dog’s ears had been cropped, indicating it had received veterinary care earlier in its life.