It's not that sunflower seeds and peanuts are incredibly harmful to squirrels; it's just that they have very low nutritional value. Raw peanuts can be especially dangerous because they can harbor toxic mold.
Can I feed peanuts to squirrels?
A favorite, but should only be provided in moderation. Raw peanuts may contain a fungus that can hurt squirrels. Unsalted and only in small amounts. Shelled or unshelled are fine.
What is the best food for wild squirrels?
If you want to feed squirrels go for unsweetened and unsalted nuts such as: hazelnuts. walnuts. almonds.chopped apple.carrots.spinach.green beans.bean sprouts.celery.Feeding Squirrels | RSPCA
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