Def okay for the rest to have it and can help if any of those might be prone to leg or neurological issues. Pill is fine if you can get the B complex just be sure not to buy niacin that is time released or flush free. Brewers yeast is good to use over their feed 1 Tab per 1 cup of feed. The only dif I see in pill compared to liquid B complex is liquid would most likely would work quicker. Use both BY and complex until you see no seizures. Then cut back to only the BY again till 10 weeks old Anything you can't find around where you live can be purchased on line I have to buy most everything I need for my flock on line.