Thanks everybody for your advice, we are resigned to not getting the girls back, the tags have been cut off, we've found the bits left! The kids hadn't been done yet. So the nannies will have holes I guess where the tags were.
Word seems to be getting out through Facebook, our local smallholder club etc so thanks everybody for that. If nothing else it'll raise awareness of theft I guess. The police rang to tell us they think it's unsolvable, they will send somebody sometime to see us.
The worst thing for me and Beccy is that we really don't know what to do now. Our land is away from the house and rented. We've got fences, gates, locks, hedges, barbed wire, electric fencing and in the last year we've lost chickens, ducks, a piglet , tools and now the goats. We're at a loss as to what to do next. We just can't do anymore to secure things. We think we're going to have to give the dream up which is absolutely devastating