I just went 'curb shopping' as they call it and found someone throwing out a pretty good sized cage (hamsters? rabbits?). Since my chicks are quickly outgrowing their current digs I would like to use this for them, after giving it a good scrubbing. Here's the question...the bottom of the cage is wire grate, with a two inch deep tray below it. I was thinking of putting a shallow bin in there to fill with shavings for them to play and sleep in and the feeder and waterer on the wire grate to keep the mess down (a little, anyway). Will that type of floor be ok for them to walk on, or should I put down newspaper or something? Any suggestions are much appreciated. Thanks!