Hi! I just got my chicks on Tuesday I believe they are a week old and they are doing good so far! I do have 1 question, 1 of them had pasty butt a couple days ago and I took a warm wet cotton ball and got it off and have kept an eye on her, she seems to be Doug fine now. Should I give them some plain yogurt just to be safe? They are on nutrena chick starter grower medicated feed. -thanks!