An animal that has been carefully acclimated to handling may willingly re-enter a restrainer. Another animal may have an intense agitated behavioral reaction or refuse to re-enter the handling facility. Physiological measures of stress such as cortisol may be very low in the animal that re-enters willingly and higher in animals that actively resist restraint. https://www.bekindtopets.com/amazing-offer-Light-Pink-Yeti-30oz-Rambler-Tumbler-Skin-p56021-great-pick/