May be the obvious answer for Guelph, ON; but the OVC exotics clinic (attached to the small animal clinic) has no problems at all handling hedgehogs 24/7. I took Reggie there this weekend for an emergency visit and they saw him right away, following up with me via phone fairly regularly. They get hedgehogs somewhat frequently and are knowledgeable about their various issues. Plus it's part of one of the best veterinary colleges in the world!