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. yumove.co.uk Submitted by theotherbogart t3_z8f1r3 on November 30, 2022 at 2:54 AM in todayilearned 21 comments 466