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You could switch all of your birds over to All Flock or Flock Raiser. It is good for birds of all ages. Now I feed my chicks chick starter until they are a couple of months old then they get switched to All Flock. I have a lot of birds so it is easier. Years ago I used to feed separate feeds until my feed store sold. This actually works out better and it comes in either crumbles or pellets. You don't need to give them grit unless you are giving the birds grains and seeds. You will find a lot of good information here 
