To develop a systematic approach to measuring environmental
effects and further validate our observed field results, a surrogate
‘‘eye’’ was constructed in the laboratory. The surrogate ‘‘eye’’ was
used in place of an actual cow eye in order to make precision measurements
of the effects of distance and wind on the IRT temperature
using the same FLIR E60 camera used in the animal solar
loading and wind speed studies. In the field, while the livestock
were in a headlock system, they were free to move their heads
making it difficult to get precision data of the eye. To fabricate
the surrogate ‘‘eye’’