We cannot free range any chickens on our property. Literally every time they are out, we lose one or two, even in the middle of the day. We are down to 9 and are getting 15 more in the mail tomorrow. We're building a chicken tractor for when the newbies get older, but most designs have an open floor. We really can't make a tractor that isn't fully enclosed by some kind of wire. Based on their natural scratching behavior, I just want to know if it is going to hurt them in the long run to have a chicken wire floor. I have seen one design where rabbits were kept with the chickens in the tractor and so the floor was enclosed, but as with most posts, it was "here's a thing we just did" and not "6 months later here's why we wish we hadn't done that." The plan is for the birds we are keeping as layers to stay in the tractor until fall when they are big enough to be introduced to our existing flock.