We just got an order of castor bean pods off ebay this morning...we have an acre and they make holes everywhere and eat everything...I am dropping pods down their holes today. Another trick, take a 5 gallon bucket, fill it half way with water, pour black oil sunflower seeds all over the top of the water to make it look like solid seeds, put a plank of wood up and over the top with a few seeds on it to encourage the squirrels to go for a swim..they are cute and we love watching them..but they are very destructive critters.