My chicks are about 1 week (6 back sex links), 3 weeks (4 of unknown breeds/sex) and 7-8 weeks (1 most likely a RIR, sex unknown). They are all together in a large brooder. Should I be giving them something besides food and clean water? We bought Dumar chick starter/grower at TSC which is what we were told to buy. It says that it is formulated for through 10 weeks old. The food doesn't mention being medicated but says that if given as directed the chicks need nothing else. We haven't given them anything else like grit or treats and there is nothing in the water. I've have been reading a lot of posts on here trying to learn as much as possible and I can't figure out if I NEED to give them anything else, if I SHOULD give them something else, if I CAN give them something else or if I SHOULDNT give them something else. Thanks in advance from a newbie trying to keep the flock healthy and happy!