Poultry farming is the raising of certain species of birds for the purpose of human use. The industry is filled with animal suffering at every stage from the hatching of chicks to their slaughter. Chickens are the bird that is most commonly associated with poultry farming. This is likely due to the sheer number of chickens raised globally for consumption. Chickens make up 95 of farmed poultry. There are two different classes of chicken that can be raised in the poultry farming industry: broiler chickens and laying hens.