The electric co has these guys cutting down trees in our area so hubby is going to have them unload some in our yard after they put them in ye olde chipper so next spring it should be ready to add to my dlm. That will save us some cash hurrays!!!
That's a nice score!
I use wood chips in my run and replenish them at least once a year.
My dad bought a small wood chipper at a garage sale and he lets me borrow it.
I cut down alder brush from around my yard and use it to make chips. It also works good for mulching around my rhubarb and other plants. Especially since it doesn't have the chemical dyes that many commercial mulches do.
Black walnut is toxic to other livestock, not sure about chickens.
I use some cedar as I have a bit of it on my lot, it's mixed in with other types of wood and I age it as well so it's lost most of the aroma. With good ventilation and mixed in with other materials I haven't had issue with the cedar.