I would say make your self a pack pole . and walk them togather . dogs that walk togather can live togather . its the same thing as taking to gang members ( two that dont get along ) and putting them in a room and the only way they can get out is to work togather . I had to do this with ray and still do it from time to time .
what you will need to make a pack pole
some good rope or a leash with a latch on each end
4 1/2 to 5 foot of thick wall PVC pipe
two calors
Okk what you do is run the leash through the PVC ( it is best if the leash ony sticks out each end about 5 ins) and then put the second latch on . put you a lead in the middle of the PVC pipe ( tie on some rope and duck tape it down so it cant slide ,, You can leave this off if you have a finced in yard .) hook the dog that has the less DA on frist on one end and the other dog to the other end and turn them lose are lead them around . when they are like this you dont have to worrie about them fighting and they will become friends cause they have to work togather all the time to do any thing .
I would only let them be on this for about an hour a day for the first few days . then you can let them be for longer time later .
Note they may try to fight at first but you just correct and keep on going . dont favor one dog over the other . you are the pack leader and as I see it he thinks he is so you have to show them that you are the boss and they are equal . hope this helps and if you are n e one else has any questions about this just ask .