I had a breach in my yard during the day yesterday and either something got in or my chickens got out of the back fence "green zone" and 3 of my 6 pullets were snatched. I found 2 of the chicken dead with no apparent marks and never found the other one I am suspecting a fox. 3 of the chickens showed up later that afternoon. We have the inside a box in the house right now instead of the coop and they appear to be very traumatized very little eating or moving around. Is this normal , anything I should do to get them back to normal behaviour?