dominant bulldog

Question
I have 2 dogs now, a 4 year old corgi, and a 10 year old lab/collie mix.  Up until now, we havent had a single aggression problem in the house.  The corgi, Cody, and the old lady Ginger, have always gotten along fine.  Cody has always been a fairly unfriendly dog with other dogs, but never really got into any fights over it, he just growls a lot.  I recently have been bringing home a 1 year old English bulldog that the owners no longer want and i want to try to adopt her.  The reason that they do not want her is because she was getting into a lot of fights with their 11 year old lab.  Being only a year old, i thought that there was potential for her to come around with the correct training and wanted to introduce her to my animals.  She has come around a little bit, and is slowly learning.  I have also recently found out that the old owners really didnt do ANYTHING with her, so she has no idea of what is right and wrong.  She has recently started to guard me from Ginger and is snappy at her and attacking her a lot at night.  Lola, the bulldog, listens when i yell NO LOLA! and it will die down, but i am worried for Ginger and afraid that she is going to feel pushed out because of Lola.  The weird thing is that Lola and Ginger will lay on the same dog bed together with nothing, but then once i am around, Lola puts her guards up and Ginger cant even come into my room, unless she is in their first.  I really want to try to make this work, and i am working on getting lola into a general obedience class to start off.  Do you think there is any hope for my babies!?!?!

Answer
Do not adopt that dog.  When a person wants to dump a dog, that person will invariably LIE about the dog's behavior.  This person has already told you the Bulldog has issues with other dogs; this is a breed that is presently suffering from VERY POOR breeding practices and it is patently dangerous for you to introduce to your other dogs a dog that has clear issues of aggression toward dogs.  You are begging for trouble.