.This dog toothbrush stick is only suitable for small or medium dogs to clean their teeth, not suitable for aggressive dogs or large dogs, please choose according to your dog to buy, thank you! . Worry free: Pet dogs often use this toy, which can ease their worries at home, improve their IQ, and won’t damage the home, clothes, etc. .New dog toothbrushes dog chewing toys also help prevent destructive behavior. Boredom, keep their minds active.