It is my understanding that having turkeys running with your chickens pretty much takes care of Mareks? Somehow turkeys are not susceptible to Mareks but pass on some element that causes the chickens to develop antibodies? There are many examples of an effective weasel trap on you tube. I once had one with a hold on a bantam Hamburg roosters leg in broad daylight. The little sob did not want to let go even when I came over. He finally did release his grip and ran into a pipe and then into the open garage. By this time I had the 12 gauge, and was waiting for him. He would pop his head out from behind something, and I would be tempted to shoot. Not wanting to make repairs to the garage, I went out and waited for his attempt to escape. When he came out he met his waterloo and the only damage was to the concrete. Luckily my wife's car did not take a ricochet pellet, or I may have been in the same condition as the weasel !