I’m a new chicken owner and new to caring for them myself (my 3 girls will be 1 year old end of May). I went with sand initially because I could keep it clean, but I have a small setup compared to many on BYC, and scooping & keeping dry isn’t a big deal. I like that there are no flies and it’s...
https://www.lowes.com/pd/Oldcastle-900-lb-All-purpose-Sand/3467923
Apparently they no longer offer it online but maybe you can go in/call them and ask about what they carry.
The first time I used sand I ordered it online from Lowe’s Home Improvement and they delivered it in two approx. 4x4 bags. It wasn’t labeled sandbox sand, but closer to sandbox sand than river sand and worked fine. May not have the particle size you’re looking for.