Ten Hereford bulls were reared from birth in 2 groups of 5 animals, and 10 bulls were physically isolated in individual pens. At 3, 4.5 and 6 months of age, they were all exposed to adult oestrous [female][female]. Individually-raised bulls initially exhibited a significantly higher proportion of disoriented (side) mounts toward the oestrous [female][female] than the group-reared animals. The proportion of rear-oriented mounts by individually-reared animals increased with mounting experience, whereas the behaviour of group-raised animals did not change over time.
|Publication Title||Applied Animal Behaviour Science|
|Author Address||Animal Science Department, University of California, Davis, California 95616, USA.|
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