Hello everyone, I’ve been a member on the forum since 2013, forgot my old login so had to create new. I’m 2013 I spoke extensively to members of the forum based on the following breeds: Boerboel, Presa canario , Cane corso, bullmastiff. my understanding of the breeds is as follows: boerboel: large and aloof to strangers , pack oriented. presa canario: DA, cat like and should be in a 1 dog household. cane corso: lean and active mastiffs with less DA and protective instincts. bullmastiff: watchdog, more laid back, not as active. More likely to be friendly to a stranger. these are purely assumptions ^ I am looking to get a puppy after 7 long years of waiting. I’m currently located in Canada and work with the Army. I wanted to wait until I was financially comfortable before bringing in a second dog. I currently have a 9 year old intact male golden retriever, he is my main man. my two questions are as follows. 1) what breed would fit the bill for me. Assertive and calm owner, with extensive knowledge on mastiffs and territorial dogs. Would like a protective dog that is watchful , accepting of family. Can be aloof to other dogs as long as he gets along with my intact male. Protective of property and owners , without being extreme (e.g fila ). Stockier and larger dog is preferable. Not overly soft or inactive. Lots of owners are inexperienced here and let their dogs loose, would like a dog that can handle their own but not afraid to look the other way. Protective and large , I especially love the darker brindle and dark faced fawn looks off the boerboel and bullmastiff. 2) dog that is not DA, aloof to strange dogs but will put up with my golden retriever. My golden is older and docile, aloof to other dogs. But compassionate and active. I would like a dog that would bond with him and not challenge him as he would lose 10/10 times. I’m not looking for answers such as the following: “ don’t get a dog it’s not fair to your golden, it’s gonna end up bad for him. The other dog will maim your golden retriever”. As we all know there are plenty of pack oriented dogs that bond well with familiar animals under assertive ownership. I’m going to get a puppy I just want recommendations on what’s best for me. If anyone thinks I’m unfit to be a mastiff owner I’d be surprised to wonder who is? My dog experience is as follows. parents have owned: German shepherd, bully kutta. me: golden retriever and fostered a GSD / LAB / Rottie mix. not overly extensive with experience. last but not least... thank you.