Loyal labrador guards canine hit and killed by car on California highway

***WARNING*** Video may be too graphic for some

LA PUENTE, Calif. - The mystery behind the latest dog making headlines, after trying to help a fellow pooch, may be over. One heroic canine and others risked their lives and paws to help out.

Last week, a black lab parked herself in the middle of traffic. The loyal labrador retriever wouldn't leave a yellow lab that had been struck and killed on a busy La Puente, California highway.

The person who shot the video first put up traffic cones to keep cars away from the two dogs.

The surviving lab was taken to the Baldwin Park Animal Care Center where staff named her Grace when they couldn't identify her.

Grace wasn't the only one to show loyalty. The driver who put out the cones and took the video came to the shelter every day to visit Grace.

The shelter was about to let the man adopt her when a couple came forward and saying Grace's name was really Maggie and she was their dog.

L.A. County Animal Control said the dog seemed to respond to the name Maggie, but said the dog will stay at the shelter until they confirm ownership.

Maggie's story isn't the first time we've seen a dog risk its life in traffic for another pooch.

The most famous example was when a dog was struck and killed on a freeway in Chile 4 years ago. A second dog ran up and dragged the first one to the median strip. The would-be rescuer was apparently a stray that then ran away.

And then there was Chili the dog in the Bronx, who was hit and injured by a car. Chili's son wouldn't leave his mother alone and tried to protect her from the police. Authorities finally managed to carry away the mother dog, who suffered from a broken leg. The two were later reunited at home.

The latest dog to make a splash was a mother trying to rescue her floundering pup in a pool. When she couldn't shove the pup out, she used the steps and grabbed the wet-behind-the-ears-and-everywhere-else puppy.

Who needs a lifeguard when you've got a loyal guard dog?