Hi, new to the group. I'd really like some input on this. We had two perfectly healthy hens, two years old, die in the night two days apart. There was no sign of sickness, perfectly normal behavior, good appetite, laid eggs the day before, and no trauma. They just seemed to randomly die in the night. All the diseases I can think of would likely show some symptoms. Furthermore, this was 2 weeks ago, and no more incidents. I've read about sudden death syndrome, but my question is how common is this? What are the odds of two chickens within 3 days? I just hate not knowing the cause, because naturally if there's anything to do to prevent it, I would! Our chickens free range on two acres and have a very clean coop. I was also thinking of potential toxic plants, but even a poisoning would probably show symptoms. Any input is appreciated, especially if you've had a similar experience. Thanks!