Culling, imo, is a last resort decision - however, aside from the quality of life for your birds you have to consider if you are putting your OWN health at risk. Sounds like your birds are pretty sick. I've never had sick chickens before however, I recently got some new chicks that I believe all have Fowl Pox. But, in the process of considering what it was and what to do about it - I thought . . can I catch this ? if I medicate - can I still eat the eggs (because the babies are in the same area as my older, laying hens) ? ? Just sharing a thought. I, of course, hope that it all works out and everyone recovers to be healthy and happy