Can chickens live with geese

Yes! So long as there is balance. You do not want a herd of 50 sheep to one or two chickens, likewise you do not want a flock of 50 birds to one or two sheep. The important thing here is balance. Letting your chickens roam in your sheep pasture is a great way to keep flies down! The chickens scratch the dirt looking for weed seeds, grubs and bugs. Fly larvae hatches in fecal piles left behind by any livestock, including sheep. Chickens have no qualm picking the newly hatched larvae and eggs out and thus reducing your fly population. Also, the addition of nitrogen rich chicken poop will aid in faster decomposition of sheep or any other livestock manure with the added benefit of providing nitrogen to the pasture graze crop which helps it grow faster. Win win situation. Be aware though that, you want to look at what potential parasites the two might share and determine what you are going to do to prevent anything from contaminating the other. I personally let my chickens into my goat pastures--not terribly different from sheep. A parasite that chickens and goat share is Coccidia and I make sure that is is always in check.