She's bored.

Labradors are intellegent, bred as working dogs, and they need to be kept busy.

They can run around for hours and still not feel that they have had a day well spent if they are not interacting with people, fetching and finding stuff.

I was never as thin as when I had my black labrador, 'Blue'. I really got a lot of exercise looking after him. He was not often bored, though he did chew a few things - one was the tortoise, but at least he didn't do much harm as I always knew that he was up to something when it was too quiet.

They do mature later than many other types of dog, so your three year old is still about a teenager. She should settle down a bit in a few years, though my Blue never really understood that he was simply too big to sit on a lap.

Anne the Pleater