Same here, I have my old mob on open loft, 40 odd birds, I rarely lose one, my other lot of 40 that are only 30yds. away get hammered when I let them out, have kept them in this week, the last time they were out within 10mins. I had percy and a hen Gos at them, I thought they had escaped unscathed but when I shut up there were 2 missing, I can't see the difference but I must be missing something