It was a moment of many emotions for the family.
"I am happy," Rojas said while holding his new dog. "I am sad."
The Rojas's daughter, also named Ada, told CBS that she and her family won something better than any sum of lottery winnings. "This is unconditional love," she said.
They haven't named the new pup yet, but they plan to keep the dog out of harm's way by keeping him off the sidewalk and only letting him go outside in their own backyard and the dog park.
So far, the county's animal service has been unable to find the owner of the dog who killed Gucci. That dog, who has no microchip, is being kept in quarantine and may be euthanized.
It's been a week of loss and heartache for the Rojas family, but as the video shows, sometimes the best cure for a broken heart is to keep allowing yourself to love others and to accept the love you get in return, especially if it's coming from a small Chihuahua pup.