I would also advise to stop putting them in pack order. They are the subordinates. Don't go "Baby is first for treats, Daisy is second, Tikeya is third, etc." That's just asking the dogs to challenge among themselves. If you must feed treats, give them a command and *then* give treats.
We ALWAYS make the dogs obay a command before recieving any food/treats, or toys.. They never get treats without having to work for them. When I feed Tikeya, Ebony, and Daisy they are in different areas of our living room (Baby and Oscar are never around when they get fed). I make them all laydown, and wait before they recieve any food. All three listen very well when its feeding time.

Baby gets fed outside, with my mom, she sits and stays before she gets her food.
Oscar has food in his bowl all day, but the other dogs never bother with it, or him.

Man, that's a tough situation, and I see red flags popping up because you are going to be bringing a newborn into this situation soon, too. The baby's safety & needs have to come first, even before the great love you have for all of your dogs. Could you live with something happening to your little one because of what a dog out of control with aggression might do?
I would never be able to live with my self if somthing happend to my baby. I have that lingering fear in the back of my head that Daisy may become fear aggressive towards the new baby. I actually emailed a dog trainer yesterday, she got back to me today, and should be calling any time now. I will talk with her for a bit about Daisys history etc, see what she thinks of the whole situation.. I really dont know how we will be able to afford the training, but we will find away I suppose.. I know first hand that getting in the middle of a fight can end with being seriously hurt, because my mom and I got inbetween Tikeya and Babys last fight, and we both ended up in the hospital.

ETA: Just thought of something. You're probably heavily pregnant right now, right? How often do you exercise the pups? Pent up energy can easily be redirected into frustration and, thus, aggression. Maybe that's part of the problem, too.
I obviously dont excersize the dogs as much now as I did before I got pregnant. But I Make it a goal to walk two dogs, every second day for about 45 min around my naibourhood. I always switch around who I take. (ex: I will walk Tikeya, my mom will walk Oscar.. Then two days later I will Walk Ebony, and my mom will walk Baby etc.. etc..)

Right now I am medical leave, I am not allowed to exercise excessively. So If I find I cannot walk the dogs; My mom and I will take a couple of them to the beach. (We never take Baby or Daisy to the beach because they are so dog aggressive when they are there, but we always make sure Baby and Daisy are seperated if we arn't at home)

Is Daisy spayed? It is common for dogs that are not spayed/nuetered to become aggersive against other dogs.
Yes Daisy is spayed.