Cruella de Vil: Just a teensy, weensy heckle? You know - murderer.
Waddlesworth: Gaw, I just realised I'm not a rottweiler after all! I'm a retriever.
Cruella de Vil: Only two minions to abuse? Oh Jean-Pierre, the world is so unfair.
Cruella de Vil: Alonzo! Find the rat and kill it! Le Pelt and I will be on the Orient Express.
Alonzo: K... k... k... kill?
Cruella de Vil: The last time I underestimated a puppy, I wound up in the pokey.
Kevin Sheperd: Can we trust him?
Chloe Simon: Now's not the time to count your change, Kevin.
Answer: Because Jeff Daniels and Joely Richardson who portrayed Roger and Anita were busy filming other projects at the time and maybe they chose not to return. Or perhaps the writers couldn't find a way to fit them into the Story. As to how Dipstick got adopted by Chloe, maybe it's just a mystery we'll never know.