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nothing here yet Find a website or blog that is informational and factual. Write an introduction to a blog post on the site's topic. An Introduction to Lab Animal Welfare. Many laboratory animal facilities have devoted themselves to ensuring humane conditions for the animals in their care, but there are some issues from which even the most conscientious laboratory cannot effectively protect its animals from- some of these issues being noise, vibration, and high cage density. Because of such issues, it is critical for the animals to have sufficient space and privacy- more so than in some other industries, such as biomedical testing, where the animals are generally sedated and placed into a more controlled environment. Densities of laboratory animals can be devastating on the nervous systems and behavioural development of the animals. The use of low density housing has been found to cause neurotoxicity on rats and mice. This can be problematic due to limited space for recovery period between studies. Mice used in research often endure noise levels similar to those of traffic; this noise can cause physical damage (headaches) and psychological stress. Many laboratory animal researchers have noted that the noise levels produced by their facilities appear to double after renovations, indicating a correlated decrease in research productivity and quality. Noise sensitivity has been found to increase with age and can also be affected by genetic and rearing characteristics and stress and anxiety levels. Animal housing is often done in cages designed specifically for the particular animal. These cages often fit very closely together, though there is no regulation as to what the ideal cage spacing should be. Some researchers recommend cage spacing of as little as 3 inches (8 cm) between cages as optimal for maintaining an ethical line of sight between animals. When this line of sight is compromised, stress levels can be exacerbated as the animals will become aware of their enclosure location and movements. Cages also tend to have a very high floor-to-ceiling height ratio, so the small animals are confined to cage bottoms for significant portions of their time. A study on nest building behaviors by mice has found that those housed in an open-top cage with a high floor-to-ceiling ratio spent far less time building nests than those housed in a more traditional cage with a low floor-to-ceiling ratio. This resulted in decreased rates of nest building and increased anxiety among the animals – something that had been observed in other animal species as well. There are serious concerns about the health of many laboratory animals; many labs are forced to conduct studies that specifically exclude certain animals due to their "suspected genetic, reproductive, immune-deficiencies, infectious diseases, congenital malformations … " These animals may be excluded entirely or not used for certain treatment approaches. This decision often has serious consequences for the animals and may even result in death. Lab animal housing can lead to poorly controlled environments that could lead to increased rates of respiratory diseases and infections amongst the animals. cfa1e77820
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