My chicks are quickly approaching 3 weeks old. All 10 are doing great and really growing. I have given them NOTHING but chick starter since they arrived. No yogurt, no eggs, nothing. I was thinking about giving them a meal worm treat one day this weekend. If I do so will I need to introduce grit? Is there enough grit in the starter to suffice? I dont plan on giving them treats every day...maybe once a week for the next 3 weeks or so. Thanks all.