What to expect from 2 male ferrets?

I have one and a half year old male ferret who is fixed and recently we got another male ferret 5 months of age. My old ferret Albert seems to be very scared of Angus and everytime Angus tries to approach Albert,Abert is running away. Next week we r going to fix Angus. So I hope albert will sense that the other one is fixed as well and he wont be so scared anymore. Also today one of my friends told me that they r eventually gonna try to kill each other. Is that true? Should I be worried? I got Angus for Albert so that he has a playmate but now I am scared I did a huge mistake:(