i find stuff like this disgusting and if it ever happened to me and my birds i would not be responsinle for my actions, you would find the theiving scumbags nailed to the telegraph pole outside my house by their boll###s, if youfind out who it is give em one or 2 from me
i would look close to home people that know what i have got in the stock loft and suspect them all untill i work it down to a short list then go door knocking for a cuppa n a chat n ask to see their birds and if they wont let ya you will know its them