Animal welfare is becoming a growing concern in agriculture. Welfare programs are being developed with no way of knowing if farms actually practice guidelines for animal welfare. Increasingly, animal welfare standards are being included in quality assurance schemes. In lab settings, measures are used to identify biological responses to evaluate welfare (including stress hormones, immune function, behaviour, etc.). Two broad measures can be used for on-farm assessment. One of these standards is housing and management systems (environmental parameters). This assesses space allowance, feeder space, number and flow of drinkers, floor types, etc. This is relatively inexpensive to audit because they are clearly defined. The second measure is the animal reaction or response to the production system. This would include records of veterinary treatments, deaths, culls, and more. Temple Grandin has created a welfare audit for slaughter plants that measures slipping/falling, vocalizing, and correct first-attempt stunning. These are more the direct assessments of welfare. The National Pork Board in the US has developed a Swine Welfare Assurance Program, a voluntary program for producers to audit welfare. Australia has developed The Welfare Audit for the Chicken Meat Industry in 2001 and the Pork Welfare Audit in 2003. As of 2003, it is unclear as to what Canada will do for audits (how they will be administered or what types of measures will be made on farm). Some program will more than likely be put into place in the near future.