I am working brushing the dog's teeth into my new bedtime routine. Both tolerate it fairly well. They mostly want just to lick the brush, so getting them to put it in their mouths is not the issue. The issue is actually getting them to stand still, stop licking and allow me to move the brush in their mouth so I do the brushing. I am not sure if I am doing the word's best job at brushing but I am trying and hopefully as they get use to it, it will be easier.