Pretty much anytime the watchdog duo of Napoleon and Lafayette are on-screen. L'il ol' cricket bug, indeed...
Lafayette: "Well, where's my BEDDY-BYE BASKET?!"
For that matter, the entire chase scene with Edgar and the dogs.
Even better, the scene when Edgar returns to the countryside to recover incriminating evidence from them. Hilarity Ensues.
When Edgar sneaks out of the house with the cats in the first place. He gets "held up" by a tree branch, notices that he's approaching a police station and promptly hauls ass in the opposite direction, only to then accidentally ride down the steps into a subway station.
The end, with everyone of the cast singing "Everybody wants to be a cat", including Napoleon and Lafayette!
Lafayette: Hey Napoleon, that looks like the end!
Napoleon: Wait a minute, I'm the leader! I'll decide when it's the end... Oomph! It's the end.
When Scat Cat and his gang run off to save O'Malley, Duchess, and the Kittens, Roquefort finds himself chasing after them. They pass a street corner café, and one patron, seeing a pack of anxious cats followed by a mouse, dumps his wine on the street.