Anyone setting up a liquid feeding system will be classified as an “on-farm mixer of animal feed stuffs”, and accordingly will need to be registered with the local Trading Standards office under Statutory Instrument No. 1872, “Feeding Stuffs (Establishments and Intermediaries) Regulations 1999”. Under this legislation,Trading Standards are required to inspect the premises and examine mixing facilities, equipment, processes and quality control. All surfaces in feed storage and processing areas should be cleaned regularly for operator safety and hygiene maintenance.

Pests and rodents should be controlled in feed storage and processing areas, and within pig buildings, as they can cause considerable damage to equipment and contaminate feeds. Early liquid feed systems were designed for restricted-feeding of growing and finishing pigs in long troughs but now short trough systems have been developed, which are based on ad libitum feeding using sensor technology. There are different merits associated with each of these two systems and a number of factors will influence which system is appropriate for a given situation. These include existing building design, genotype, staff experience and management. Christianson S, Lemay S, Lague C, Patience J, and Gonyou H. Water usage by grow-finisher pigs using dry and set/dry feeder. Prairie Swine Centre Annual Research Report, Saskatoon, SK. 2002; p. 24. drinks such as wine, beer and dairy products. Liquid feed will start to ferment immediately after dry and wet ingredients are mixed. This is caused by naturally occurring bacteria and yeasts present in feed ingredients and the environment.In addition to flow rate, some manufacturers of wet/dry feeders recommend that water pressure be reduced to be no more than 10psi. A general recommendation is that water pressure in drinking supply lines be limited to 20psi. This makes activation of delivery devices (paddles, nipples, etc) easier and tends to reduce water wastage from drinking devices.

Massabie P, Granier R, Rousseau P, and Lauriac C. Reducing slurries dilution through less drinking water waste for pigs: study and improvement ofMWPS. Midwest Plan Service. Swine housing and equipment handbook. Publication no. MWPS-8. Iowa State University, Ames; 1983. The Money Trough is a useful item through the whole game, and can be obtained early. With some preparation, it can be obtained after a single Blood Moon. Shields Jr. RG, Mahan DC, and Graham PL. Changes in swine body composition from birth to 145 kg. J. Anim. Sci. 1983; 57:43-54. Brooks PH, Carpenter JL, Barber J, and Gill BP. Production and welfare problems relating to the supply of water to growing-finishing pigs. Pig Vet. J.