The relationship between the maximum magnitude of selective brain cooling (°C) during the last four days of water deprivation and plasma osmolality as recorded on the day of the maximum (A; y = 0.02x - 4.38 [± 1.37]), and maximum magnitude of selective brain cooling during the last four days of water deprivation and the change in osmolality (difference between osmolality on day of maximum and osmolality on day 3) (B; y = 0.03x - 0.46 [± 0.52]), and maximum proportion of time spent using selective brain cooling during the last four days of water deprivation and osmolality on the day of maximum proportion (C) for nine sheep.