Yea my meridionalis is the biggest i have and i think she usually pooped in the same spot away from her burrow against the wall. I noticed it when i transferred her today. You also have to remember that the slings convert as much food as they can into growth. The faster they get bigger, the better their chances of survival (in the wild). A long pair of tweezers are great for feeding and any maintenance. Get a paint brush too for when you need to move them. The bristles are gentle but still firm enough to encourage them to go where you want them to. Well... Usually... As you can see from my pic earlier, sometimes they like to make things difficult haha