Do they really even need it? I have 1 year old chickens that I've never given grit to. Should I start? Should I get my new chicks some chick grit? If so, how do you feed it to them? I thought I read somewhere when I first got the older ones that they didn't need grit if they had access to dirt (their entire run is dirt and I usually throw in some lettuce, vegetables, dandelion, or clover every day). The chicks don't eat anything but the chick starter, and are kept in the brooder until fully feathered (I will start taking them for supervised visits to the run at about 3-4 weeks). Thanks in advance for any advice.