* When Dudley tells his mother that he really loves his job at T.U.F.F. and doesn't want to quit, but for her, he'll do anything.
** Followed by another when she decides to let him keep his job, even if she does worry about him because of it, because of how happy it makes him.
* Dudley realizing just how much he needs Kitty in "Iron Mutt".
* "Looks like the Lonely Lizard has finally found a friend!"
* In "Diary of a Mad Cat", Dudley tells Kitty that even though he doesn't know her, he wouldn't have anyone but her as his partner. [[http://images.wikia.com/tuffpuppy/images/2/2c/DOAMC82.png Kitty's reaction bring heartwarming to that]].
** It also helps that Dudley was being quite insensitive towards Kitty at the beginning of the episode and he's pretty much apologizing for hurting her feelings earlier on.