I have a dog that is half boerboel and half Dogo. The bitch was a pure Dogo that was owned by Olympic dogs and the father was a Boerboel owned by another party. When I got the dog I was a little unprepared,( I thought I was prepared), but she my dog turned out to have dog aggression. I had owned a fila so I thought I could train her myself but I surrendered and got a trainer that taught us how to cope with that aspect. Over the years she still lights up when another off leash dog comes near but we have learned how to deal with her, That being said I do trust my life with her and in my area that is important. We have a lot of drug activity and homelessness so when I walk my dogs early it is dark and the folks that are of a concern know her and give us a wide berth. She does not go off on people and people that we know she is friendly with. I do lock her up when folks come over ,(full house with small kids etc), just to be safe as I live in a small house. After owning her I have thought would I get another and I have to say I do not think I could get the level of security that I feel with this dog unless I go through Olympic dogs. I would start training the dog early and often with a trainer that is familiar with these breeds as I live in an area where ignorant people will let their dogs off leash. I and my wife carry a shocker to scare other dogs away if they start coming too close.I might add this dog without any prior training ,(I think could and would) stop a home invasion without being trained to do so.She is if anything a deterrent. Novice owners beware. All that said she is 8 years old and no major heath issues, except thyroid. We also had her fixed too early and she had a problem with crystals when she was young since cured. She has grey around her muzzle but is still very athletic and when she turns it on you would think she was three. I have to say I frequent Olympicdogs quite often, (over the years ) and I love checking out his new pups and will probably get another after this one passes.