Aggresive ?

Well I was thinkin it was a bad idea just thought I would get some opinions, she is my first dog I wont get rid of her shes too good to me. I just wont hunt her with other dogs... She was raised with 3 other pits and never had a prob. then I had a house fire had to move... She was I guess showing dominance at the new place and would fight the female and males occasionally. I got her fixed thought it might help but no, She is good with people its just at anytime she can fight another dog. She was also face barked by a border collie (not my dog) when she was in her kennel sometime ago I think this intensified this, but yea she is my first and I wont cull her but again I wont hunt her with others thanks for the help!!