10lbs is nothin!!
I dunno where your from, but snow is on the ground for up to 4 months here in Chicago... There isnt a square foot area WITHOUT shit on it in my yard after winter... Fill probably 2-3 garbage bags just because its all wet..... best time to do it (this is key) is once the snow melts, but it is still frozen... MUCH easier to clean up.
POOP