My Dogo is about 3 years old. Kind, loving I take him to work every day. I build custom homes and lots of people come inside the house he barks once just to let them know he is there. If he has met you even once he remembers and dosnt bark. He is great around chickens goats sheep cats other dogs. BUT if you where a stranger and got in my truck or came on my property especialy if my 4 year old son is there, I think you would be lucky if you only lost only your arm.If there is another aggressive dog he just avoids, but he will win if the other dog keeps coming. All the rules are different on his property. He is first a lover and lap dog, and then a great white angel that protects his family and property, I dont think he would even hesitate going to the death for his family. He is a great dog, we love him so much. I wouldn't change a thing