It's a delightful hobby, I don't feel stoic about it, I mostly obtain great joy and satisfaction from spending time with the hens. The success rate isn't too bad for six years of chicken keeping, especially if you deduct the one fox raid and the lipidosis, which were my mistakes. When it's read in one short post it seems awful, but it reads worse than it really is.I understand how you feel. My first batch of 6 hens all came undernourished and sick with a respiratory disease, probably IBV. Two also had severe bumblefoot and one also suffered from laying huge eggs and chronic prolapse. Two died within a week of arrival of suffocation/cyanosis. I had to euthanize the one who prolapsed all the time about a year later. The others held on and actually became fairly healthy and had good lives, but none lived to be older than four.
It was the word "rescue" that drew me to this thread. I didn't intend to get "rescue" hens but that's how it ended up. It was a sad and tremendously difficult experience. But I learned a tremendous amount and am ever more grateful for the healthy chickens I have now, the majority hatched and raised here by broody mums.
It takes a certain fortitude to take care of ailing birds. I salute you.