I thought I'd better post an update. I took him to the doc and he's now on Prednisone, so he's going from cranky to really cranky. It's a 7-day dose and both the doc and the pharma said that he should start to feel some relief in 4-6 hours. The swelling is significant and it looks like a branch scraped his calf so he got a huge dose of the toxin. I don't think Ivy Block would have helped.

I took him home, he's fed, watered, and tucked back into bed with my remaining supply of dark chocolate easter eggs. He's exhausted, but hopeful that by Saturday he can do little bit of riding. Fortunately, the affected areas aren't near a bike saddle.

Thanks, everyone, for your concern and well wishes. Yellow, your Peep fly really made him laugh!