An ITC spokesperson told CBBC Newsround's website about a quarter of the complaints were from mums and dads.
It upset their kids so much, many are now afraid of their pet dogs.
In the ad, a man wakes up on his sofa gagging. Furry paws appear from his mouth and out jumps a snarling, mongrel-like mutt!
He takes a mint and the dog disappears. It's supposed to show gum can get rid of ponging "dog breath".