I am sorry that your dogs and chickens are not coexisiting nicely. Our lab met the chickens when they were 2 days old. They were kept in a secure brooder, but I made sure to let the dog see them every day, and even smell and touch them. Whenever she got excited, she was told leave it, and was taken out of the room. Then the chicks went to the coop/secure run, and I still make it a point to let the dog tag along , and she even waits at the door while I clean the dropping board. She has had a few chickens get loose and free range around her, but she just watches them, and doesn't chase. I would not trust her to spend the night in the coop with them, but supervised shes been great. Some dogs have a much stronger prey drive, and think that is what they are supposed to do. My dog actually hates all songbirds, hawks, and the occasional helicopter that flies over, but the chickens are ok in her book, and I believe it is because of early exposure to them, and asserting that they were mine.
Good luck with the new birds