In an email to BuzzFeed, Sonny's owner, Tina Ruvalcaba, explained that Sonny had a stroke as a puppy, leaving him partially paralyzed.
When Sonny was a month old, Ruvalcaba noticed something wasn't quite right. "he would walk a few steps and fall over," she told BuzzFeed. "He looked like he was blind."
The breeder offered Ruvalcaba the option to pick another dog, but she refused. "He was our boy and we would do whatever we needed to make his life comfortable and complete."
Despite Sonny's condition, he lives a fairly normal and happy dog life.
Sonny's life got even better four years ago when he was reunited with his brother Buddy. Buddy needed a new home, and his original owners got in touch with the Ruvalcabas, who were thrilled to take him in.
"Sonny is the alpha dog," Ruvacalba said. "He is the boss of Buddy, [but] Buddy doesn't mind as long as he has a ball in his mouth."