I am wondering if the fir and sphagnum peat moss is ok for redfoots. After doing research into substrates for Gretta I found it would work well because it helps hold in moisture. I also put extra sphagnum moss in her house for her to hide in, she loves it. =) However,someone on the other, general tortoise forum that I am a member of said they have never heard of using this mix with RF's. What do you think??? The last thing I want to do is make my baby Gretta sick...