Nah...just stir it each day when you feed. Mine is like sugar cookie dough...no liquid over the top at all. Your chicks will thank you for it, as they won't be getting sticky, wet feed dried in their fuzz and then have bald spots left behind.
Not ready in 8 wks if I can help it! Too, too soon. I like to let mine get older and gain more flavor in their meat before processing. They will probably be 10-12 wk old before processing, depending on how hot it is in the month of June...I hate to process when it's too hot out. These birds will free range all day for a good bit of their feed along with my layer flock.