Don’t “milk bones” clean dogs’ teeth sufficiently?
Hard, digestible treats, such as “milk bones,” clean teeth by abrasion, but dogs and cats, as carnivores, break and gulp their food. They may bite once, to reduce the size of the item, but then they swallow it. The abrasion offered by hard treats, though beneficial, is primarily on the crown of the tooth rather than in the crevice between the gum and the tooth where the odor and infection is concentrated.
