I have some younger birds - about 9 weeks old that i want to mark. That way when I mixed them with the other birds I will know their age. I also plan on breeding a mix my dark cornish and my barred rocks. What works best and stay on better. Leg bands or wings clips. If i understand it, i have to chang the leg bands as the birds grow. Do you change the wing clips also? Any advise you can offer would be great! Thanks!