I am about to introduce my 7 week old group in with my laying hens. How do I separate the 7 weekers when it is time to feed? I wanted them to stay on Grower and all of my laying hens are on Layers Crumbles. Should I just switch and put them all onto Flock Grower (or whatever the stuff is called for all ages of chickens)? Will this cause issues for the laying hens? Ideas would be great! Thanks