Dog won't sleep in the dog house

First Blue Healer I had, had never been in the house. Got really cold, and my ex felt sorry for him, and brought him in the house. laid out a horse blanket for him, and he never left it, until we let him out. Another I had, wouldn't go in the doghouse either. Brought her in the house one time when it got really cold, and I thought she was going to tear the place up, until I let her back out. She did not want to be in there.