That is terrible news. A similar thing happened to me years ago. I had bought a trio of very expensive birds an hatched 13 chicks. The chicks were over half grown when I went out one morning and all 16 were dead. It's heart breaking and so frustrating!This is an update I did not want to make. A few weeks ago around dinner time a fox got into my chicken yard. They took out about 22 birds in no time, most of them the heritage birds I have been breeding and documenting in this thread. It was really hard to see all my hard work and ideas strewn in pieces across the yard. I have 11 birds left in my flock, and a few sex-link meaties left. A few of them are heritage. I also ordered another batch of NHs from freedom ranger to grow out and start breeding again next year.
I also just bought 200ft of hardware cloth and am in the process of skirting the entire yard. Hopefully that will fix the problem.