No couch potatoes for Blitzen although he loves to curl up with you and thinks of himself as a lap dog. Blitzen does not do well with strangers. He does well at dog training and is quick to learn tricks but is aggressive to people he doesn't know. The problem in our family is that we foster children and that is too much change for him and he is now crated almost all the time which is making things worse. We love him but he needs a new home as soon as possible.