Mayda Estrella, of Richmond, says the family's Chihuahua, named Manchas, jumped in between the canine invaders and her 4-year-old son Sunday. A pit bull grabbed Manchas with its jaws and carried the Chihuahua away.
Contra Costa County animal services officials say the Chihuahua was killed, and the pit bulls are now in custody.
The pit bulls' owner says they had escaped their yard by chewing through a fence. Estrella says her front door was open when the dogs came in.
She says when she saw the dogs come in, she ran into a bedroom with her other child, a newborn baby.
County officials say the owner won't face criminal charges.