Effects of mirror-image exposure on heart rate and movement of isolated heifers (1999)

Piller, C. A. K., Stookey, J. M., Watts, J. M.

Abstract

Socially isolated heifers exposed to a mirror were calmer, based on lower heart rates than their control counterparts tested in visual isolation. Based on the lower heart rate and the reduced amount of movement displayed by isolated heifers a mirror-image reflection may reduce isolation stress of heifers in a chute. The effects were most pronounced after an initial habituation period after several days of exposure.