I have no experience with reptiles and anesthetics, but I know they can REALLY mess up dogs and cats! I suspect though that it's just as likely that Odyn is just being a ball python. I bought a young male last October who was underweight and, as a result, had a fabulous feeding response. In January he suddenly quit eating, I was stunned because he's NEVER missed a meal prior to that. After 9 weeks, (with me an emotional wreck) he just as suddenly decided he was hungry again and returned to his normal excellent eating habits. I'm curious to see how he does this year, ... but can assure you that I'm not going to be nearly as anxious about him this year if he goes on another fasting session. :-)
I think Odyn will be just fine, just hang in and try not to worry. <3