Ok so I sent my hubby to get feed and he comes home with layer feed, my babies are 13 weeks.......... can I mix it a bit at a time with there starter grower???? and meaty feed???? I already had the bag open before I noticed it was the wrong feed, or I would just return it. My babies won't start laying for at least 2 1/2 to 3 months I doubt it will keep that long. I know layer has extra calcium, but will a little hurt them? if I mix it say 1/4 to 3/4 of their regular rations?..........also I have a mix of roo's and hens ordered straight run, so it's like 12 roo's to 10 hens.