Furthermore , cribbers which did not perform the stereotypy during the 3 - hrs of testing had higher cortisol levels than non-cribbers , whereas those performing the stereotypy did not .
In a 2015 study , after ACTH injection , cribbers had higher cortisol levels than non-cribbers .
Cribbers which did not perform the stereotypy during the 3 - hrs of testing had higher cortisol levels than non-cribbers , whereas those performing the stereotypy did not .
In a 2015 study , after ACTH injection , cribbers had higher cortisol levels than non-cribbers .