Jeff

Jeff is a dog who moved into the Backyardigans and Frontyardigans' neighborhood. He was born deaf and only communicates using sign language.


 * When Jeff does sign language when no one else is with him, the subtitles appear.
 * In Season 6, Jeff does less sign language as he learns to speak via lip reading.
 * Starting in Season 7, Jeff dons a cochlear implant.