Neapolitan Mastiffs can be very domineering. I did not see if you had wrote if they are the same sex or not. If so, same sex aggression is very prevalent in the breed. Be prepared that they will never get along, and things will only get worse. Sounds to be that they are both alpha. There will be a constant fight to try and fight for the alpha chair in the house. Unless you are willing to keep them separate at all times, I am sad to say you must part with one of them. I would hate if you had small children, and you or them tried to break up a fight. Things can get messy quick, and I would hate for anyone to get hurt.
Answered by neolady - 12/11/2012 2:16:34 PM