hun, at times we've had three seperate "pairs" of dogs - two little females, two large females and two large males - each in their own yards. each "pair" have fought - not over food, but as their way of playing - they were just like over boisterous kids that would scrap for fun and then go off and play quietly together! when we lost one of the males and one large female, the two remaining dogs got to share a yard, and same thing. not sure if it's just their breed (cattle dogs) but to them, play meant rough housing. we ended up giving the female away (she wasn't a working dog whle the male goes in the truck with DH) - and have had no dramas with them. i HATED the sound - it always scared me even though i knew they were playing - and i was worried about having kids around them

i'm not sure if training will help, but perhaps it's an option to look at. i know how terribly hard it is to get rid of one of your fur babies (and we ONLY did it cos she went to my bro's house) and really hope it doesn't come to that...

FWIW - our little dogs still play fight, but are so very gentle around kids - it's a jealousy thing for them - one gets patted before the other, and when they go to play, they scrap! they do the same when they get together with mum's dogs (from same litter) - so i can't offer a solution, just an understanding ear...