I really think we need to see a videotape of a fight. It is hard to tell just from words whether this is an actual fight or just play. OUr two males play very roughly together. One will be pinned and be bunny kicking the other, they will be biting and occasionally meowing in protest if a bite is too hard. BUT it is play, not real fighting, (oddly enough sometimes starts with one grooming the other). It usually starts with some circling and laid back ears or an ambush, and finishes when I interrupt by accident or when they collapse from lack of breath. I have a video I could show you, but I'm not sure I can post it, I think it's too big.
Dr. Seuss~DLH (brother's cat)~June 2007-
Misty~DSH (my cat & Mooby's mom)-?- Sept. 15, 2014
MooBoots(Mooby) ~ DMH(Mom's cat)~July 21, 2008-
Sunshine~ Golden retriever X white german sheperd (Dad's dog)~October 24, 2008-