This may seem like a super silly question, but my chicks are 7 weeks old - almost 8 weeks old - and have been spending nights in their coop and the days have been spent foraging around the yard. They are eating the chick food recommended by TSC. Do I need to provide grit too? I had thought that I did not - since they are free-ranging out in the yard...but something I just read made me wonder if I am wrong. Actually I have a 2nd question - by this age (7-8 weeks) the red combed chicks are probably cockerals, right? I have 2 cochin with very red combs and waddles - since about 4 weeks old. I have one Old English with a red comb - not no much red waddles, but compared to his sibs - he and another are definitely boys. BUT, I have 4 Tetra Tints or White Leghorns out of the pullet bin at TSC and two have just started to get reddish waddles and combs...Could they be boys too?? I only have 8 chicks - and 4/5 out of 8 is NOT GOOD!! Thanks!