We use to get straw but had some trouble a few weeks back and had to get lucerne instead. The ducks like is as it seems softer and they scuff it around in their house and make little nests. For this reason we kept buying it. But now we have little flies that seem to be breeding in it. The flies are in the duck house on it, around the duck food in the veggie garden (where the old beading goes) and anywhere there is poop. We did not have them before but the weather is warmer now as we are in Australia. We have hung up some enviro and pet safe fly traps but I cannot see this being the answer. We will go back to straw/hay and see if this helps. BUT has anyone else had trouble with lucerne?