The dog is chased down with a car and is finally hit, although the impact isn’t shown and the dog doesn’t die. For a comedy, I still found this scene disturbing.
Norbit is briefly shown as a baby in the beginning of the movie. There's also a character who mentions being pregnant but in the next scene it's revealed she made that up
A dog is purposefully run down but survives with injuries. Norbit runs across the street and is hit but it's not hard enough to fully knock him over and he's uninjured.