Patch and Rolly both appear to have two dog dishes each in "The Dogs of De Vil", despite the fact that they should only have one, and on one of Rolly's dishes, his name is misspelled: "Roly".
In one scene, Pongo and Perdita's collars are of opposite colors.
Cadpig: Rolly, feelings are like the table of pies. If you eat every single one, eventually you're gonna puke! I'm asking you to share your pie before you toss your cookies.
Rolly: Lucky and I were supposed to raid trash-cans today, but he never showed up! He's with his new friend!
Cadpig: Now, now; it's not like they're spending every minute together.
Lucky: Blaze, it's been great spending every minute together!
Blaze: You know you can, you can learn an awful lot from cartoons.
Lucky: Oh, I don't feel so hot; I think I'm getting seasick.
Cadpig: My center is definitely moving.
(The main pups are watching Anita go away.)
Rolly: Does this mean there's no picnic?
Lucky: No picnic? She's taking her clothes! We might not have a family anymore!
Cadpig: (sadly) I see a lot of therapy in our future. (happily) Won't it be great?
Lucky: Rolly, didn't you have enough to eat?
Rolly: I did. I'm having a snack now.
Lucky refers to "Watch for Falling Idols" in "Dog's Best Friend".
In "The Dogs of De Vil", when Cadpig said that her center was moving while she and Lucky were seasick, she most likely meant that her stomach was feeling queezy.
Given how Perdita reacts to Scorch (growling and then kicking him out into the crowd), we can assume Cadpig gets her violent tendencies from her mother.
Something that only Rolly can do: eat 101 hot dogs and still have room for more.
The soap opera that Spot and Cadpig are watching is a parody on General Hospital.