Geese need at least a 6 inch deep pond that is about 4 ft diameter in order to breed. My pair of GD Toulouse have always had close to 100% fertility. This year my goose has laid about 35 eggs. She has had 17 eggs brooding in her nest for a 1 week. 8 of her eggs hatched (now 1 week old goslings) beneath by my #1 muscovy hen. These geese are supposed to live 23-25 years. text me @ 509-901-8119. Tampicoguy