This is Ragnar - he was originally with us last year and has been returned. We are not even sure where to start in describing him. We have a 8 page report from his adopters describing him. There are tons and tons of good stuff on him and what a wonderful dog he is - but he is described as having a Jekyll and Hyde personality. He will do great and then all of sudden turn on someone that he knows or was just loving up to. Unfortunately in a home with children, family and friends the changing of personalities did not work. Since we have seen none of the unwanted behavior here we aren't even positive what to look for in an adopter. He is only two years old - has been to trainers who have not seen the issue so can't even begin to advise on additional things to try. The behavior exists and rears it's ugly head when least expected. About 80% of the time he appears good with other dogs and then all of a sudden that goes bad. He was originally shown as a Retriever mix but some of the behavior being described leads us to believe there is some Chow in there. For anyone interested in meeting Ragnar we will require they read the write up on him from the prior owner. Unfortunately with his bite history we will only get one final shot at finding him the right home. We hope one is out there. We 'think' a single man or woman who can demonstrate they are in charge, that has very little company and strangers through the home would be best. He will also need to be the only dog. He will also need a fenced in yard to avoid having trouble with neighbor dogs.