My seven month old dachshund used to sleep like a log, ever since the first day he came home. Recently he has begun to wake in the early hours and cry and howl. The first time I put it down to perhaps being woken by a loud noise or some sort of outside disturbance, but he has done it since for no apparent reason (I know there is always a reason!) I always make sure he's been outside before bed and he's well exercised every day. He refuses to get back into his bed in the kitchen, but if I take it into my room he'll sleep like a baby! It's not every night, so it isn't yet a habit, but does anyone have any ideas how we can overcome this?