Clunkers, next to Chandler and Rachel
Clunkers is a dog who appeared in the seventh season, in "The One Where Chandler Doesn't Like Dogs".
During Thanksgiving, Phoebe is secretly babysitting Clunkers, her friend's dog.
At this time, Phoebe is living with Monica and Chandler. They are upset, especially Chandler, who reveals to everyone he hates dogs.
The dog's gender is Female. Phoebe refers to her as a she a lot. Ross said, she. Monica referred to the dog as "she”. And, while Chandler did refer to the dog as a “him”, In the same sentence just before that, he said, “she”. So, the “him” was probably a mistake on his part.