So sorry to hear it. Sounds like you did what you felt necessary to protect your current and future flocks. I'm fortunate not to have had any "problems" with snakes. The only issue I have is that there are poisonous ones running around. And those get to meet the end of my shovel too!
Good luck getting a new brood started. Try not to be too sad about it.
Good luck getting a new brood started. Try not to be too sad about it.