My female German Shephard is in heat. She just had a litter 3 months ago, so we are trying to keep her separated from our male GSD. The problem is the male. It's as if he is in some kind of trance. He is not eating, sleeping, and neither are we. He is up all night whining and howling. He has chewed up door knobs and parts of her kennel trying to get to her. What can we do, to ease this time for him and for our family, so everyone can get some sleep?