Dr. Bobulsky and Dr. Valerius both have knowledge and experience with hedgehogs. They're my go to vet for my snakes but have plenty of experience with other animals, hedgehogs included.
I'm not sure about hedgehogs, but they were very knowledgeable with my daughters rats. We even had a surgical procedure done and they were awesome! They know where to look for the answers if it's not at the top of their head.
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