2 females not getting along

Question
Hello, i'm sorry if this question has been addressed before but i just wanted to add my unique situation. I have 2, 4 year old female EBD's that have been raised together since puppies. Around 1-2 years old they occasionally started to fight over toys as each one wanted to have what the other had. They got a long most of the times but started fighting more and more intense each time. I finally ran out of options and decided to revoke all toys from them. This solution worked and they never really had any problems. I tried occasionally to give them toys back but it almost always resulted in a fight. Unfortunately i had to decide that the only time they got toys was if they were separated. Fast forward 2 years and one of my EBD's had to have  a TPLO procedure done. They have been separate for 2 months while in  recovery. She has been in a large crate/small pen kept in the household with interaction from my other female. They have just always been separated by the bars. Now the 2 months of recovery time is up and i am trying to re-introduce them together. When i let them out, they are very wary of each other, avoid each other and their hair stands up on their backs and they give each other the "evil eye". I have seen them fight enough to know that this is an indicator that one is coming. I prompty separate them before anything happens. I have been slowly trying to introduce them back together but i dont seem to be making as much progress as i want and the process stresses me out very very badly. They have not actually gotten in a fight yet since i started the re-introduction process and it has probably been well over 8+ months since the last time they actually did. I guess my question is to see if you had any suggestions to re-introduce them or if there was anything i could do once i saw the signs that they were starting to get angry with each other that would teach them not to fight. I know that once they start fighting that it's usually not a good sign, but i also had them together and get a long very well after their first fight.  I am very anxious to stop separating them and feel that the longer i wait, the harder it will be. Thanks again for any advice that can be provided.

Answer
Mike,

It sounds like they both want to be boss and you have done everything that can be done.

Sometimes there are dogs that just will not get along.  

It can be very dangerous to have two bulldogs that fight.  Once they start fighting, it is really hard to separate them.

I think these two bulldogs need to be an "only dog".  I don't think it is worth the risk of them fighting.

Christine Puetz