Do I need to order any of these extras they offer? QCC Quik Chik 4 oz - Get your chicks off to a good start with this combination of vitamins A, D, E, B-12 and electrolytes. More $3.95 BBC Broiler Booster 4 oz - Contains everything in Quick Chik PLUS biotin, which counteract weak legs and yield of stronger, healthier meat birds. More $7.95 GEL Gro-Gel Plus - Shipped with Poultry Orders - Immediate nutrition and hydration for all baby poultry in a very concentrated and digestible form. More $3.90 Vaccinate 25 chicks for Marek's Disease (baby chicks only). What is Marek's Disease? $3.75 Vaccinate 25 chicks for Coccidiosis (baby chicks only). (FEEDING MEDICATED FEED WILL NULLIFY COCCIDIOSIS VACCINE) What is Coccidiosis?