Chrissy: Jack, that smells good.
Jack Tripper: Chrissy, I haven't even started cooking yet.
Chrissy: Well, you better hurry up and start cooking so you can catch up with the smell.
After Jack brings the puppy over to the girls, the box he brought the puppy in was placed on the back end of their couch. At one point, it is knocked over, and you can see it falling down to the floor (past Janet). In a few shots, it's back on the table, and none of the characters were in a position to pick it up to place it back there.