how do you stop a jackapoo puppy constently barking and wanting attention at night? Its 9 weeks old and in a dark cozy crate at night but screams and barks over and over. I don't know whether to quieten it each time but that might make it think I'll come in every time it makes a noise. Or do I leave it to bark so it learns no one comes unless it's quiet. Please can you help, we are all very tired.