The dog was chained up in the backyard when the Africanized honey bees attacked.

The dog's owner Chantel Armenta tried to get him free but could not, and when she ran in the house, the bees followed, stinging her and her husband.

Her husband is allergic to bee stings and had to be rushed to the hospital. He is expected to live, but the dog may not.

"My husband said they didn't think he would make it, and I'm very upset, and I'm so sad. I just wanted to save my dog," Armenta said.

When firefighters arrived, the bees attacked before they could even get their protective gear on, but they were able to spray the bees with a foam and kill them.

The University of California, Riverside has done extensive research on Africanized honey bees. For more information about the bees, go here.