nim_opet t1_iyctp4f wrote
Reply to comment by KypDurron in TIL: Dogs don't have digestive enzymes in their saliva, nor can they chew side to side. Their jaws only allow for up-and-down movement because their diet doesn’t need as much chewing as ours does. by theotherbogart
Your jaw can move up/down and side to side; like when you chew gum; that’s how grinding works. You don’t need majorly exaggerated left-right movement; simple up-down will also move it sideways across the molar surfaces
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