The Poultry Industry is highly concerned with maintaining flock welfare. In 2006 welfare auditors began training to satisfy the National Council of Chain Restaurants and the Food Marking Institute’s welfare standards. These are realistic standards that can be divided into the three sections of the poultry industry: live bird production, transport, and slaughter; and are concerned with the bird’s “major issues of freedom,” that is preventing hunger, thirst, discomfort from poor ventilation, pain, injury, disease, fear and distress while allowing birds to express normal behavior. These standards have been developed based upon the European Union’s standards, along with a panel of United States scientists and behaviorists. The American Association of Avian Pathologists’ welfare committee are currently adapting the standards to be more appropriate for American poultry production techniques, focusing on breeders, hatchers, grow-out, and processing plants specifically.
There are a number of “hot button” issues that are often criticized. Some of these issues such as litter quality and beak trimming apply to all sections poultry production, while others are limited to certain aspects of production such as Breeders, Broilers or Layers. Litter quality if often a concern in poultry houses because it directly affects the air quality. Litter should be dry and friable, able to be reduced to smaller sized with little effort; these traits are correlated with house management. Beak trimming is more controversial than many of the other topics, since beak trimming does cause pain to the birds. However, if trimming is done when the bird is less than one week old, this pain is believed to be outweighed by the benefits gained. The purpose of beak trimming is to prevent cannibalism amongst the birds, as well as feather pecking, egg eating, and problems which occur when the male pulls on the female during breeding. Although the trim may cause initial pain, it is less than what may occur throughout the birds life time if they are attacked by the other birds in their house. There are various methods used to trim beaks, and the operators must be extensively trained to do so. These methods include mechanical removal, hot-blade removal, electrical removal, and infrared removal. Some studies have shown that the infrared method causes the least pain since it only causes damage to the tissue which then sloughs off at a later date, rather than removing the tip of the beak all at once.
The Breeder industry faces critiques for the use of plastic trans-septal pins, aka Noz-bones, which keep the male pullets from eating from the female feeders, and feed restriction programs. Feed restriction programs are important for female reproductive health, because overweight birds will not have normal ovary development; Under the two methods: skip-a-day, and restricted daily feeding, the birds are always provided with the amount of feed they need but not enough so that they can become overweight.
The Broiler industry is most concerned with skeletal damage, which can be related to gait scores, and with the stunning methods used at the slaughter plant. Skeletal damage can occur for many reasons towards the end of the grow-out stage when the birds are so heavy, but most often occur because of handling. It is very difficult to determine if the damage occurred ante-mortem or post-mortem from carcasses. In live birds skeletal damage and hock legions can be determined by the birds ability to walk “naturally.” Gait scores are assigned on a 6 point scale in the UK, and a 3 point system in the US.
The Layer industry is often criticized for the battery cages which the birds are kept in. There are disadvantages to the cages, such as a higher influence of disease, and some studies say there is a slightly higher incidence of fragile bones and blood spots in the eggs; however there are many advantages as well such as less labor, cleaner eggs, better feed efficiency and egg production, lower salmonella contamination and eliminated parasites, and a lower risk of disease introduction from outside of the house.