Abstract
Between
4 weeks and 6 months of age, dogs were subjected to a battery of
behavioural tests. The ability of these tests to predict fearfulness,
activity and learning ability of the dogs when adult was assessed.
Consistent individual differences in fearfulness were apparent at about 8
weeks of age, and the ability to predict adult fearfulness increased
with age. The most useful tests involved responses to a strange person, a
strange dog, a strange place and certain unusual objects. There appears
to be genetic variation between dogs in fearfulness when young, but
genetic selection against fearfulness would be more accurate if carried
out in adult dogs rather than in young dogs. Consistent individual
differences in activity from 4 weeks of age were found, but this
behaviour correlated poorly with the activity of the dogs when adult.
Puppies responded to fear by inhibiting movement. None of the tests used
predicted the dogs' performance on specific learning tasks.
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