Indoor intensive livestock operations are often referred to as factory farming and are criticized for the low level of animal welfare standards and associated with pollution and health issues. According to the Worldwatch Institute, 74% of the world’s poultry meat, and 68 percent of eggs are produced by intensive farming method. Hens, particularly from battery cage systems, are sometimes infirm, have lost a significant amount of their feathers, and their life expectancy has been reduced from around 7 years to less than 2 years. One alternative to intensive poultry farming is free range farming, which allows birds to move freely in the outdoors. Friction between these two main methods has led to long term issues of ethical consumerism. Free range farming is quite difficult, because it requires a big farm with great drainage, protection from winds and predators. Free range farming is also difficult as too much heat, cold or damp can all have a major effect on the animals – which is why battery farmers have more success over free range farmers as they are able to control the weather conditions unlike free range farmers.