No we do not brush our dog's teeth. They have evolved over the years without brushing so don't wanna alter nature's balance. Though right now my dog's breath has a foul odor due to a teeth that is getting a bit dark. (a cavity or something perhaps) I was thinking that probably they still also feel toothache just like us human beings that could make us squirm in pain whenever we feel it. Thanks for this informative post. I love dogs, I love cats! ^_^