In contrast there was no difference between the cortisol
profiles in LD and DD however, a significant variation
over time was observed (p = .0009)(Figure1B).
The
relatively high variance in the cortisol time point means
throughout LD and DD (Figure 1B) and irregular ups
and downs in the individual profiles (Figure 2D) may
relate to studies showing that minor perturbations in
the environment can eliminate the cortisol rhythm in
horses [34].