I'm so, so sorry.
Losing one that you have put so much time into taking care of and helping it get better is always really hard. I lost an 11 week old chick yesterday, that I was just beginning to integrate into the flock, to a hawk. It's always very upsetting. I've lost some to foxes as well. No matter how hard we try to prevent it, those predators are always ready for any opportunity. 

