A animal psychologist and zoologist says poor social skills drive dogs to attack other animals and people.

And in the case of attacking animals like sheep, once they start they find it hard to stop.

Two dog owners who have had themselves and pets attacked spoke out about Hawke's Bay's roaming dog problem at the weekend - within hours of their story being told a horse, goat and 49 sheep were killed by two dogs - one which is still on the loose - in Bridge Pa, Hastings.

Animal behavioural expert Mark Vette said the dogs involved in the Bridge