The buckets were weighed twice daily to determine water intake, and spillage was minimal. The salt was available to the ponies for an hour per day when no other food or water was available. Salt blocks were dried in an oven at 100 Covernight and then weighed (kg) to calculate daily NaCl consumption. A fecal sample from each pony was collected daily in the afternoon for 9 days during the control period and for 9 days during the furosemide treatment and dried
to constant weight.