For the past month my free ranging chickens have been penned up in the run due to a fox coming around and picking them off. The run is nothing but dirt now because they ate all the grass. They seem bored and are pecking at each other. I do offer scratch and throw in grass sometimes, but seems only to keep them busy for a few minutes. I would like them to have access to bugs and grass while being safe. I'm having a hard time trying to figure out what to do. The coop is 8x8x8, on 4 legs that raise the coop of the ground about 2ft. The run is attached and allows access under the coop also. Would it be possible to somehow be able to move it frequently, to allow access to fresh grass? We have a tractor we could pull it. Maybe we could add some wheels or something? I just don't know if it's to big for that. Any ideas?