You should get with a friend and set up a situation where you can expect the other dog to pass by and correct Emily's behavior. It sounds as though perhaps she has been attacked by another dog while on leash, You will need to practice on a leash with...

Have you tried cooked chicken? Beef Liver works good when dehydrated.

Sounds like Lulu is getting confused about who is in charge. I would suggest you find some local obedience classes to start attending. In the mean time I would suggest some simple changes in her routine, for example make her sit and wait for you to p...