Something is eating my barn animals! Help!?

okay so i live on a farm and we have tons of animals and we have woods behind us and are barn lot is fenced in but not that good and we have had like 15 of our chickens, geese and ducks dead behind the barn in the morning for the past week and they are like gutted out and just the outside is left and we usually put all of our animals up at night but they still manage to get out and something eats em.. we think its raccoon but not sure please help! i love my animals to much for them to keep dieing