Cane Corso Mastiff Question

That is a very vague question? How old are each of the dogs? Have either one had much socialization with other dogs? Will there be a supervised breaking in period? A general answer to this question is yes, both breeds have the ability to socialize well, it is up to how you approach the situation that will make the difference.

For a while depending on age, I have a now 2 yr old female cane corso and belive me I do nothing but big dogs. Any way when cane was 6months, bullmastiff start bullying her. They start fighting more and more mainly about attention. A cane will not back down and they won't forget. It got to the point she would wait until I turn my back and start fighting.