The 7-month-old female, named Raffiki, disappeared from Rosa Torres' Panorama City backyard on Feb. 13.
"We have no idea how she got out of the house," Torres said.
Raffiki, was apparently turned in to an animal shelter without any identification.
Torres, meanwhile, put up signs and checked a different branch of the shelter, which serves her neighborhood.
Torres said by the time Karma Rescue responded to her phone calls, it had found the puppy a new home.
"She's not a dog for us," Torres said. "She's not just a pet. She's a family member. She's my daughter. She's my son's best friend."
The rescue group apparently told Torres to apply to adopt the dog, as well. Torres, however, was turned down. She believes she was rejected because she lives in a "bad part of town" and because Raffiki wasn't microchipped, spayed or wearing tags when she was found, according to an online petition.
"How do I explain it to my son, you know? 'I'm sorry, but a rescue doesn't want to help us get your dog back,'" Torres said.
Read more here, on KCAL, to find out what Attorney Marla Tauscher, plans to do next.