I've raised just about everything on goats milk, mostly rats and rabbits. I'm sure it would work for squirrels. Go to a Petsmart and look in the small animal section, they have a kit with a little bottle and different nipples. You can get goats milk from most grocery stores. They have it in the refrigerated dairy sections and sometimes in cans on the shelf.
Keep him on a heating pad on low to keep warm.
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