spcaLA in Hawthorne is the holding animal control facility for Lynwood. Look under lost dogs https://spcala.com/lost-pets/
and adoptable dogs: https://spcala.com/adoptable/ because after 4 days the dog will go up for adoption
phone: 310 676 1149
Check also surrounding LA City and County Shelter websites, they put up photos of found dogs right away, keep in mind that dog's can run 10 miles a day every day, so check shelter websites daily. Lynwood is also close to the area serviced by the Downey Shelter on Atlantic Ave. website: https://animalcare.lacounty.gov/
There is also a shelter called SEAACA that receives animals from around that area: https://www.seaaca.org/
I pray your baby is found soon!