... in the diets of dairy animals, poultry, swine, pet foods, cattle feed, and sheep feed. Animal fat is also used in ... and bacteria would spread uncontrolled through the population. One estimate states that some 40 billion pounds of slaughterhouse wastes ... supply the rendering plant of birds slaughter house, which mainly to recycle the dead birds and wastes, such as feather, viscera,blood….. feather meal ...