Hello! I've had 4 chickens and 5 ducks for the past year. Half of the outdoor run is dirt. The other half is under the coop. We tried this rock system (big river jacks, smaller rocks then pea gravel on top) to make it easier to wash things away. Needless to say, it's not working well. Drainage is poor and the whole area is just gross. We want to change the bedding but not sure what to use. We were thinking sand. We live in New England so weather is nutty. Any suggestions?