sawdust can it be too fine?

A friend of mine is helping me build my coop tomorrow.
He is a carpenter but also makes and sells hundreds of wooden toys of all types that he sells at craft shows etc.
He has offered me all of his sawdust and shavings which is mostly pine and occasionally other woods but no cedar.
The problem is right now he only has sawdust as he is making wheels for the toys.
Hopefully later on he will have more shavings for me as I have gotten those before for another project.
The stuff on the shop floor now isn't super small I just have to sift out the wood bits from making the toy wheels.
But he has also offered me the sawdust from his dust collection system and I worry that will be way to fine for use in the coop.
Hay/Straw are very expensive here in Alaska and I already blew out my budget for this coop and run build as well as everything else I have bought for the Chicks.
So how fine is too fine for sawdust for a chicken coop?
I used the search feature but didn't get a definitive answer on this question.
Thanks,
Chris

If it's really fine sawdust, I imagine it will be dusty inside the coop. It may also compact, sort of like paper mache' and be difficult to clean. Maybe as part of a mix - some dried leaves, dead pine needles, etc would help it out...

The finer the sawdust, the dustier its going to be in the coop. If you have chicks in the coop, then there is the issue of impaction, should any of the chicks try to sample the edibility of the sawdust.

Pine wood shavings are very absorbent and work great as a litter material.

That's a good idea to mix it with other stuff and I may do that.
I suppose I could also use lawn clippings from the bagger on my lawnmower once It gets to where I need to mow the lawn.
Or buy one bale of straw to add to it until he gets me some wood shavings.
We'll see what I can come up with when I talk top him again about the sawdust and when he thinks hell have some bigger stuff.
Chicks won't be in the coop for awhile. They won't arrive until 5/20 and will be inside my garage for a few weeks after that.