Some animals are just too fragile and short-lived to make good pets. I know. I used to raise rabbits for the pet market and had some as personal pets, even a couple of "house rabbits". Much like chickens, they just live long enough to break your heart. I guess that's why they were intended as part of our food supply instead of ever becoming very popular as pets. We have dogs, cats, parrots, etc. for that.
I understand your pain, as I am also one who gets too attached to my animals. But faced with the realities of trying to make the farm pay, I have had to put these things in perspective and the chickens and rabbits, this time, will not have names and will be there to provide meat and eggs. I will not allow myself to think of them as pets again and will maintain a certain emotional distance. I can give them the best life possible for the time they are here, without investing my emotions on so personal a note as pets manage to take.
I am so sorry for your loss, and I hope you will also change your mind and try again, but perhaps this time, protect your heart a bit by keeping them for the eggs and whatever they can provide for you rather than get so very attached. It just doesn't pay on animals that are so ingrained into every other critter's food chain.
Don't go away. Stay, learn and try again.
Again, I do understand and only say what I said because I also learned the hard way I can't handle the attachment to them and the cost that attachment has always cost me.
Connie