Hi there. I’m sorry about your losses. I had a fox kill 12/12 in one coop late May and left them, sadly this was my favourite flock. 2 weeks earlier my dog died. May was not a good month. All the above are really good advice and just double check you have a good sturdy coop as last week we had the same damn fox dig into my coop, kill And take 4 from my other flock. Also make sure if you haven’t already to double wire or Use super sturdy mesh because foxes will rip wire off a coop. Electric fence works amazingly! I can speak from experience electric fence deters them really well.
Wishing you the very best with your chickens.
Wishing you the very best with your chickens.