Chickery!
I made a floorless chick pen! It's pretty simple. Four uprights, the same size, and then eight horizontals, made of lath. It's two feet tall, and I know that because I used one continuous piece of three foot (1/4") hardware cloth, slit the corners up 12", and folded them out. The hardware cloth is actually stapled between the lath and the uprights, for anyone looking real close, so it's very much secured there.It's not exactly a tractor, but it's very portable. I put it out in the field, and eight rocks hold down the outflaps of hardware cloth, so that chicks can't tunnel under the edge, and predators are likely to find it inconvenient to get under the edge too, should they come around in the day.
It takes only a couple minutes to move all the rocks off, relocate it, and replace the rocks.This is going to be the middle stage of the Chick Cycle. I want the chicks to be outside as soon as possible, but it's proved dangerous in the past to put them in with the whole flock when they are tiny, so this is a middle stage.