i use plan pine shavings and i have no problem and i got about 40-60 asf in 3 large tanks. ( counts on fingers) I not changed the liter in mine in about 2 weeks and no oder.. I do ahve an issue with them chewin .. they chewed 3 plastic bowls, several water bottles( stoped this by getting a tin sleeve made ot protect th bottles) and Ialso place a strip of plywood ( 2inch wide about 5 long) in each cage and they happier now..
i also check the diet if feedign somethig high in salt may make them go more causign the smell.
i'd be very concerned about the glues in the plywood,solid wood would be safer.
TIMOTHY W. HURKMANS
" Do you really believe that what you believe is really real ? "