One problem is keeping squirrels from eating your bird seed, another is once they have it, how to keep them from chewing it up.
To deter squirrels, see our tips on deterring squirrels by clicking here.
To keep them from chewing up your bird feeder, keep your bird feeder full. If the squirrels can get to the seed, they won't chew on the exterior of the feeder, trying to find the seed inside. If you are sick of them and want them gone, click on the link above for tips on deterring squirrels from your feeder.