Phoebe: [playing guitar and singing] Smelly cat, smelly cat, What are they feeding you? Everybody. Smelly cat, smelly cat, It's not your fault. Monica.
Monica: They won't take you to the vet.
Phoebe: Chandler.
Chandler: ... You're obviously not their favorite pet.
Phoebe: Joey.
Joey: You may not be a bed of roses.
Phoebe: Rachel.
Rachel: And you're no friend to those with noses.
Phoebe: Ross, those are the only lines we have. Sorry. Okay, back to the chorus.