I wanted to give Cooper some fresh pine to chew up, so went and found a couple flat pieces that had popped off a tree when it fell, but decided against those because they'd fallen on the ground that had a bunch of poisonous mushrooms--not going to take a chance the wood touched them. So I trimmed off some short pieces of small-ish brances from a spot that couldn't possibly have touched anything. Brought them in and tossed on his cage top. He'd just finished playing with a bunch of other toys, and evidently he was all pooped out! He saw those branches and let out a long, loud, very "tired" sounding sigh and it was almost like he was thinking "Oh no! More work to do!"
Didn't stop him from chewing it all up though. What a nice pine-y smell in here