I would not worry to much...I have a particular male who will fast 3-6 months a year! The first year I was freaking out, but the last couple it just seems like thats what he does. He has always bounced back eating fine. I have a couple other males who will fast 1-2 months a year. I would wait a few weeks until you feed him again. And then try your normal routine.

Happy Bday by the way!