I have about 5 different bird cages here, and I was wondering if the wire bottom would hurt the feet of baby chicks if I used one as a brooder. I am planning on putting some cardboard in a rim around the outside to keep the heat in of course. I am going to keep them indoors at first but I have a cat so I need to make sure they can't escape and find their way to the part of the house she is in. Also for extra protection just in case the cat gets sly on me lol. If it might then could I put down cardboard at first and top it with some bedding, and how long should I leave that in there?