Fig. 2. Effects of the number of animals per automated feeding system and length and time of feeder access on the hourly pattern of heart rate (HR). Cont-6and Cont-12 = 6 and 12 wethers per pen and feeder with continuous access, respectively; Day-2 and Day-4 = 2 and 4 wethers per feeder with 8 h/day accessduring daytime; Night-4 and Night-8 = 4 and 8 wethers per feeder with 16 h/day access at night.