The Effect of Water Flavor on Voluntary Water Intake in Hospitalized Horses
2021
Abstract Hospitalized horses are at risk for colic due to several factors, all of which may reduce voluntary water intake (VWI) further contributing to the development of colic during hospitalization. Our objectives were to determine if using flavored water (sweet feed, peppermint, or apple-flavored electrolyte) increases VWI of hospitalized horses and to determine if horses consumed more flavored water versus plain water. We hypothesized that (1) in hospitalized horses the availability of flavored water results in more VWI than the availability of unflavored water and that (2) average intake of flavored water is larger for flavored versus unflavored within the experimental (flavored) group. Four groups of hospitalized horses (n = 10/group) were recruited. All horses were provided two buckets of water. Control horses were provided two buckets of plain water. The other three groups were provided one bucket of plain water and one bucket of flavored water (sweet feed, peppermint, or a commercial apple-flavored electrolyte). The total and the flavor-specific water consumed was recorded during a 72-hour period. There was weak evidence to suggest that the use of flavored water increases median total water intake of hospitalized horses by a factor of 1.76 [95% CI: 0.98 to 3.11] for sweet feed (P = .05) and 1.85 [95% CI: 1.03 to 3.33] for peppermint (P = .04). The results strongly supported that horses consumed more sweet feed–flavored water (27.0 mL/kg/day [95% CI: 14.6 to 39.3] more water) compared with plain water (P = .0001).
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