Pea gravel works like a charm on wet surfaces. If you can get red clover seed, toss it on the outside gravel and let it take root. The root system works to help bind the gravel together and makes for great chicken forage.
Gravel will work well inside a coop. Use a good layer of straw over it and all is well.
Gravel will work well inside a coop. Use a good layer of straw over it and all is well.