I don't vaccinate for anything. For me, it's all in the good, natural husbandry to let them survive on their own. For us, they are a source of food, so we don't consider them pets. We are bound to lose some along the way, and although we try to minimize it, we don't keep the ill around. Natural selection will give a much stronger, more vibrant flock that will drastically improve the enjoyment of your animals. The weak and sick are culled, so the strong may survive better.
X2!!
X3