We have been butchering chickens for the last 3 years now. We do it in Oct. About a week before Halloween. At the 'kill' spot there is usally blood on the ground and stump. When the birds are hanging to drain we have 2-4 holes dug for the blood to drain into. The feathers are plucked by hand onto a large plastic sheet. The end trails, heads, feet, orgins all have a place. The heads in a bag with the feathers. The neck bones, feet, and wings(if removed) go together (someone takes those for their dogs). Then the livers, hearts, gizzards go together for cleaning and someone else takes those for eatting. The rest of the end trails get tossed out. We bury everything left over. The blood drain holes are filled back in with dirt, and any extra feathers and or mess (because you will get this) is raked up and it's all buried. There usually isn't to large of a mess and in 3 years have never had a problem with preditors digging up the remains. We usually have 3-5(if lucky) people helping on butchering day. We butcher anywhere from 125-200 birds at a time and it takes about 4-6 hours to do by hand. We have speed on our side!!!(or at least I think that's fast)