5 pitbulls occasionally fight!!

I am a proud owner of 5 pitbulls ! Trouble(dad) Mimi(mom) frankie(son) Emma(daughter) and Julez(daughter) , My babies seem to get along most of the time but every now and then they will fight , and its a bit scarey i am able to break them up and everything seems to be fine but this past week while i was trying to break up the two baby girls one of them bit me i know it was not intentional and i did not have to go to the hospital. It just seems to happen for no reason either because on is getting more attention them the other or because one wants to go out before the other. I know they are a pack and from what i understand they have a pecking order but i could still use some help will this get worse as they get older ? please help!!

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