I've only had duck for 2 years, I absolutly love them but the enclosure is giving me nightmares! What a muddy smelly mess the run is 20 by 20 and there is no way grass is ever gonna grow back. what can i do? I want an attractive enclosure but I cant move it around to new areas of grass all the time. unfortunately my ducks only get to free range a couple times a week so I've been reluctant to add flooring in the run but something needs to be done! Please tell me if its safe for ducks to spend most or their time on gravel (this is the only idea I have)