I can't find where my baby corn has defecated usually. I use aspen shavings as my substrate, I used to use aspen clumps which were brown. It was always easier to detect it on the clumps because his stool had some white in it. He's eaten twice now, and I have yet to find where he defecated. How unhealthy is it if it stays in there if I were to change the substrate at least once a month? Do you have some tips on finding where he defecated? I've tried moving around the aspen to see if i can find some clumps, but it doesn't work since it all usually clumps up eventually =)