I don't know, plums, but our cockerel has recently disappeared... So far all hens accounted for and sleeping in the cattle shed, where I think they'll be safe... 
Well! He's not been seen for more than 10 days, so the minute I post that he's gone, he reappears! No sick note or anything! 
plums, I am so sorry about the massacre of your hens 
It could be that the electric fence was shorted, battery gone/going flat, not quite set up properly... They do take a lot of maintenance, especially as the lower strand has to be low enough to stop him digging under and therefore very prone to shorting out on grass, blown leaves, molehills... 
How do you have yours set up - and do you check the charge every day?
I had a flexinet one and my henhouse was on a known fox run to water and I never ever lost one to foxes. I did, however, watch foxes sniffing round the perimiter and watching the hens.
Topic: Foxes and Cockerels? (Read 9850 times)
