Yes, I realized they are getting a little aggressive these days. One usually tries to hop on the others back and shake. The other would get mad and defend. I will try to get them sprayed soon.
Are other shavings like this one okay? https://www.petco.com/shop/en/petcostore/product/carefresh-shavings-plus-pet-bedding
I used to have a litter box but they never use it so I took it out.