Motch, S. M., Harpster, H. W., Ralston, S., Ostiguy, N., & Diehl, N. K. (2007). A note on yearling horse ingestive and agonistic behaviours in three concentrate feeding systems. Appl. Anim. Behav. Sci., 106(1-3), 167–172.
Abstract: The objective of this study was to compare behaviours of yearling horses fed concentrates under each of three management systems. Over two consecutive years, 16 yearling horses (n = 8/year; 4 fillies, 4 geldings, full siblings between years) were observed over a 60-day trial period/year at 15:30 h each day. The experimental design consisted of three factors (sex, feeder type, and year); repeated measures on feeder type: tire feeders (control system), individual tub feeders, and manger feeders. Frequency of agonistic interaction was affected by feeder type and sex. Fillies performed more than three times the total number of agonistic behaviours per feeding session as geldings. In both years, horses spent the most time eating and had the fewest agonistic interactions when fed in tire feeders.
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