We have a pair of buff geese, Chester and Penelope, and they are pretty funny and happy campers. Last fall we finished a lovely 20x10 pen with an extra 4x6 goose house. All of it is made predator proof. Two questions: what do folks use as the flooring of the pen? Right now it's just wire so predators can't tunnel under but there is poop everywhere. I'll spray it down but can seem to keep up. Should we put a four or five inch layer of rock? Chips and constantly flip it out? Second question: what's good strong grass to grow in the yard that will keep my lawn green and my geese happy? Right now we have 1/2 moss and 1/2 grass. The soil is less than ideal. Should we fertilize with something organic so it can grow roots faster and keep the plant ahead of the geese?