In the episode where Chandler and Joey get the chick and the duck, when Joey comes home, he and Chandler start arguing about the Chick, Chandler says I'll take her back to the store tomorrow." Joey returns a second time when Baywatch is on and sees the chick and says "I thought you were going to take her back to the store today". But they are still wearing the same clothes and Ross and Rachel are still at the hospital