I'd go with winter as the reason. I've never noticed my hens caring about one of the flock being in the buster. In fact I've never noticed them behaving any differently when one disappears permanently. I had a BA that did her first adult moult at this time of year back in 2013. STUPID time of year up in this climate! But she didn't really seem to suffer from it even though she was half naked.
I didn't say my computer couldn't get hit, just that *I* don't have to worry about the Windows 10 security issue

I suspect there are a whole lot more Win 10 users here than Mac OS users.