feed crumbles have gotten mixed in too, but havent gotten spoiled by water spillage. I keep my waterer on bare floor away from the deep litter. I remembered reading about keeping feed and food area clean but have only been able to be successful at keeping those areas dry not at keeping the crumbles up. I am not as concerned with the scratch grain getting in as those crumbles.... I am thinking I will have to start all over again with litter? I am not sure if what was spilled will turn moldy or spoil or what. I have tried to research similar problems but havent had any luck.