Dairy farming cattle feed

In a recent study of range cattle, the overall prevalence of serotype 0157 H7 from fecal samples was 1 % and this parameter was only 0.6% in animals that were on cow-calf pasture (Renter et al., 2003). New Zealand is a major cattle producing country that relies mostly on pasture feeding, but epidemiological evidence and cattle surveys suggested that the prevalence of E. coli 0157 H7 appears to be extremely low in that country (Cook, personal communication). Other researchers reported only two 0157-positive animals in a study that included 531 cattle in 55 dairy farms (Buncic and Avery, 1997). In studies conducted by New Zealand s Ministry of Agriculture and Forestry, E. coli 0157 H7 was never detected from a total of 3000 bovine and 500 ovine carcasses (Cook, personal communication). Based on these reports, it is apparent that cattle fed pasture had a lower 0157 H7 prevalence, but further work is needed to determine if the effect is due to the pasture feed itself or to the physical separation of the animals. 

Vitamin E, a natural antioxidant, is essential for growth, disease prevention, tissue integrity and reproduction in all fauna. Natural vitamin E, as it occurs in plants, consists mainly of a-tocopherol (III, R = H) with minor amounts of y-tocopherol (IV), although this ratio can vary as for example in the vegetable oil composition shown in Fig. 5a. In animal husbandry, such as dairy farms or cattle feed lots, the stock diets are commonly supplemented with vitamin E, because processed grain-based cereal fodder, hay, and silage are deficient in vitamin This results in higher levels of a-tocopherol... 

The production of PBBs in the United States ceased in 1979 (lARC 1986). In the past, PBBs were released to the environment during the manufacture of these compounds and disposal of commercial and consumer products containing these compounds (Hesse and Powers 1978 Neufeld et al. 1977). One of the significant sources of environmental contamination occurred as a result of the accidental mixup of FireMaster BP-6 with cattle food in a number of farms in the lower peninsula in Michigan (see Section 3.2 for additional details concerning this incident). By June 1975, 412 farms had been quarantined. Disposal of contaminated feed, animal carcasses (poultry, dairy cattle, swine), and animal products (dairy, meat, eggs) contributed to environmental contamination (Dunckel 1975 Kay 1977). No information was located on the current levels of contamination at these locations. 

Organic dairy has many faces and models in likeness to conventional dairy. The original model is family farm based, and I believe the more sustainable method. Family farmers who grow at least 50% of their feed, and are active in the day-to-day management of the farm appear to have good success. By trading off their physical labour, they return more dollars to the acre than the conventional farmer. The second model is the modem model where cattle are kept en masse, and feed is brought to them. This model has many of... 

The major animal-derived products can be divided into edible and nonedible red meat products, milk and milk products, poultry and e products, and wool and mohair. Edible red meat products primarily come from cattle, swine, sheep, goats, and animals such as horses and Asian or African bufialo. The major nonedible red meat products include rendered fet, which is used to make soap and formula animal feeds bone meal, which is used in fertilizer and animal feeds manures used as fertilizers and hides and skins, which are tanned and used to make leather products. Milk and milk products (also known as dairy products) are produced primarily by dairy cattle and include whole milk, evaporated and condensed milk, cultured milk products, cream products, butter, cheese, and ice cream. Poultry (chickens, turkeys, ducks, geese, pigeons, and guinea hens) and egg products are nutritious, relatively inexpensive, and used by humans throughout the world. The hair covering the skin of some farm animals (wool and mohair) is also considered an agricultural product. 

---