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McDonnell, S. M., Freeman, D. A., Cymbaluk, N. F., Schott, H. C. 2nd, Hinchcliff, K., & Kyle, B. (1999). Behavior of stabled horses provided continuous or intermittent access to drinking water. Am J Vet Res, 60(11), 1451–1456.
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van der Kolk, J. H., Nachreiner, R. F., Schott, H. C., Refsal, K. R., & Zanella, A. J. (2001). Salivary and plasma concentration of cortisol in normal horses and horses with Cushing's disease. Equine Vet J, 33(2), 211–213.
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