As an alternative, try what I do. I take unwanted compact discs, drill a small hole near the edge and hang them from trees with kite twine. They spin in the slightest breeze and flash sunlight. However, I do this only when my fruit is almost ripe because the birds will eventually get used to the flashing light.
For squirrels, I take an old sock, put a small handful of blood meal in it, and tie it to a tree. I do this with several socks. Squirrels will not go where they smell blood. This should also work to discourage deer. NOTE: This will definitely NOT work with rats or raccoons.
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