Daniel Martínez sells candy on the streets of San Cristóbal, Ecatepec. He lives with multiple arthrogryposis, a condition that prevents him from moving his arms and legs.
No one pushes him except Keily, a little dog he trained himself since she was just a two-month-old puppy.
It is neither a coincidence nor a video trick. Guided by Daniel, Keily learned on her own to stop at traffic lights, wait when cars are passing, and move forward only when the street is clear.
Every push of her snout against the wheelchair is a decision, not a reflex.
The scene was first recorded in 2022 and has continued to circulate ever since, because every time someone sees it for the first time, they feel the same thing: that there is a loyalty there that is not taught with treats, but with years of mutual care.
You can follow their story on the account @danielykeily, where Daniel shares everyday life with Keily.