On Friends, Ross and Monica’s childhood dog was named Chi-Chi.
Chi-Chi was the Geller family dog, mentioned several times rather than regularly shown on screen. The name first comes up when Ross discusses the family’s old pet and explains that Chi-Chi was sent to live on a farm with a family friend. This detail is easy to overlook because the dog is part of the siblings’ backstory, not a recurring character.
Chi-Chi is also remembered during Monica and Ross’s parents’ anniversary celebration in “The One in Massapequa.” Monica includes the dog in an emotional speech, while Ross fondly reacts to a photograph. The story adds another layer to Monica’s childhood: she jokes that Chi-Chi’s knee surgery cost her the braces she wanted.
A common mix-up is with the other dogs and pets mentioned on Friends. Rachel’s childhood dog was LaPooh, while Phoebe’s dog-related storyline involves Clunkers. Chi-Chi specifically belonged to Ross and Monica’s Geller family.