Having read about how bad it is to put cedar shavings in with your chickens, I'm a bit gun-shy. I sent the husband to the feedstore and he brought home something I'm not sure of. It doesn't say exactly what the wood shavings are. I went to the company's web site and it says they are Douglas fir and Hemlock. Is this ok to use, or should I sweep it out and go get something that says "pine"? Thanks.