dogs that fight each other

Question
Hi Kristin,
I live in Costa Rica, and have an animal rescue program. I have 5 street dogs, all fixed, one male and 4 females. Two of my females viciously fight. The younger female is twice the size of the smaller one and seems to fight till the death with the older one. Two days ago it got so bad that the younger one bit up the older one so bad she can't walk very well, and lost a tooth.
My other two females started to go at it the moment the fight started, luckily I was able to stop them and remove them from the area. The small male dog joined in with the two fighting dogs but did not activliy bite, just encouraged the younger female who is his best freind.
My husband and I are at a loss. I am 7 months preganant with my first child and we are considering adoption. Costa ricans do not leash thier pets, walking them is hard because thay attack every dog we encounter or vice versa. Five dogs leashed against two or three unleased on the street is a recipe for disater. Lastly when the older dog goes on her back and screams but still defends herself against the other, nothing stops. We tried to leave them this time, but we had to stop it, it looked like the younger one was going to kill the older. In addition, they sleep and lay and can play together nicely. Please help...water, loud noise, blankets don't work, beating them which is horrible but is the only thing that eventually works. I just read an article about dominant and subordinate behavior. They definatley do not know there position in the pack. Where as the others have since fought it out. My husband and I feel that I am not dominant and there for they do not respect me or see me as a the boss? Do you have any thoughts.
They have a good routine, but we just moved into the city four hours away from the jungle where they grew up, and we have not started a regular walk that they always had before. They sleep in there own room at night in there own beds, they are seperated at meals. I am really worried about the walks here in the city as none of my nieghbors seem to have there dogs leashed and or there dogs are not fenced. What should we do????
Molly

Answer
Well one thing I can recomend,is possibly finding another home for the two dogs that probably fight the most-now trying to find that out,you'll probably have have perhaps have a friend take one dog at a time over night(or put it in a seperate room)and see what ones were causing the problems

Or you could try to keep them all in different rooms,or at least the ones that fight