“…This is why, in addition to the ‘classical’ stereotypies, well known and described ([ 42 ], cribbing, windsucking, weaving), we have considered other abnormal repeated behaviors also cited and observed here (tongue playing, head movement, repetitive licking, etc. [ 15 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ]). - Vacuum chewing (associated with lip licking) and yawning, which frequency increases in both chronic and acute stress situations [ 52 ].
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