I have it in some of my birds, I brought it in from Lanark auctions, if I were to cull them it would only leave me with 12 which are in a separate pen and are clear, does anyone know if it remains in the houses or the run? I dosed them all with Baytril, which meant binning all the eggs for 28 days, it has been suggested that I give them Tylan as that has no withdrawal. At the moment I am getting about 18 eggs a day from 30 birds, not a very good return on all the feed they are eating