They are in a solid floor environment now and I just hose it out as needed, more frequently in the hotter months.
And I don't think you can decay the trex decking.
We have some old trex that I want to use that we have enough of to do the floor of the new duck/chicken house. For some reason, and he doesn't know what it is exactly, DH doesn't want to use it and have a solid floor. So what other options do we have? Our entire yard is fenced with field fencing...