Quote from Phoebe in The One Where Chandler Doesn't Like Dogs
Phoebe: Hey, is Chandler here? Joey: No, no. He went for a walk. Phoebe: Okay, well you cannot tell him, but look who's back. Joey: Oh, no, no, no. He went over to Ross's to bring the dog back here. Phoebe: Oh, no, the dog's not going to be there! Joey: You think?