My mouse cage??????????????????????????…

I actually would not use it at all. I have 3 rabbits, 3 mice and 2 hamsters and we use mouse/rabbit bedding not hay. We use the hay for the rabbits litter box or a treat and I don't think that would be very comfortable for the mouse. At pretty much every pet shop there is mouse/rabbit bedding so i would just get that. It is ok for the environment and creates less dust. Most bedding and hay will make your mouse sneeze which will lead to respiratory infection so i would get the bedding it is used for All kinds of animals.