Please answer these questions: 1. Do you always give chickens worming meds or just if them seem sick?? Like for a dog, every month??? 2. Why do you need to give grit if they are in a dirt ground run and not if they are free range? Maybe they eat up all the grit eventually and even though there's dirt it's not the right size?? I've been thinking of these and haven't found any answers...thanks. By the way, first eggs yesterday!!! I'm thrilled!