I've been using them for few years. Except I use them for our duck and chicken runs. Even though my run is roofed and fully enclosed when we get alot of rain the woodchips become damp and little bit of puddles along the door. Right before its going to rain toss couple bags ontop of the woodchips they soak up and wetness then turn to saw dust. I do the same in my duck run by the pool areas. We also use them in our bunnies litter boxes