I ended up with 4 2 week old RIR chicks today. The last grpup I used a heat lamp for. This one I wpuld rather not use the heat lamp. I got a chicken heat mat. I put it on 2x4s and then used a white mesh self over it with a towel. I have 2 sleeping on it and 2 off. I am just second guessing myself with this set up and want to be sure this is ok. I dont have any cover over the heat pad. Should I? Anything else I need to worry about? Thanks for advice or opinions on this!