I went down to feed the chicks this morning and counted them up. Only 7 there this morning.....one of the brown ones has gone, oh dear. Yesterday there were definitely 8. For the last couple of days I've been letting them out of their cage with mummy hen so they can free range with her in the coop. The coop is well fenced so I don't think that a stoat could have got in.. although we do see them around the farm. We've got stoat traps set up on the outside of the chicken wire fencing. As yet we've never caught any though.
Hmm, maybe a harrier swooped down and got the chick, probably more likely since they regularly scavenge in the area.
Today I've kept them inside their cage, as much as I like seeing the harriers gliding around I don't want to risk losing any more chicks. Will go down later and let them out for a bit but only while I'm around.