Unfortunately it does happen. I would just make sure your husbandry is all correct so it doesn't happen again. Was it a pretty young snake? Some people like to step in and assist feed a snake that isn't eating. If you have a snake in perfect husbandry that isn't eating and losing a lot of weight you might have to do that. Snakes will starve themselves to death and sometimes you may need to step in. I have had many discussions about this with a friend of mine about whether or not it's something that should be done. It is really stressful on the snake, and can kill the snake, but it may also jump start their feeding response. I would only do this to a snake that is so thin it's deflated. I had a six month old female I was considering assist feeding, but my friend kept telling me to wait it out a bit longer, she did start eating on her own.