Poultry feed is food for farm poultry, including chickens, ducks, geese and other domestic birds.
Before the twentieth century, poultry were mostly kept on general farms, and foraged for much of their feed, eating insects, grain spilled by cattle and horses, and plants around the farm. This was often supplemented by grain, household scraps, calcium supplements such as oyster shell, and garden waste.
As farming became more specialized, many farms kept flocks too large to be fed in this way, and nutritionally complete poultry feed was developed. Modern feeds for poultry consists largely of grain, protein supplements such as soybean oil meal, mineral supplements, and vitamin supplements. The quantity of feed, and the nutritional requirements of the feed, depend on the weight and age of the poultry, their rate of growth, their rate of egg production, the weather (cold or wet weather causes higher energy expenditure), and the amount of nutrition the poultry obtain from foraging. This results in a wide variety of feed formulations. The substitution of less expensive local ingredients introduces additional variations.[1]
Healthy poultry require a sufficient amount of protein and carbohydrates, along with the necessary vitamins, dietary minerals, and an adequate supply of water.[2] Lactose-fermentation of feed can aid in supplying vitamins and minerals to poultry.[3] Egg laying hens require 4 grams per day of calcium of which 2 grams are used in the egg. Oyster shells are often used as a source of dietary calcium.[4] Certain diets also require the use of grit, tiny rocks such as pieces of granite, in the feed. Grit aids in digestion by grinding food as it passes through the gizzard.[2][5][6] Grit is not needed if commercial feed is used.[5] Calcium iodate is used as supplement of iodine.
The feed must remain clean and dry;[2] contaminated feed can infect poultry. Damp feed encourages fungal growth. Mycotoxin poisoning, as an example, is "one of the most common and certainly most under-reported causes of toxicoses in poultry".[7] Diseases can be avoided with proper maintenance of the feed and feeder. A feeder is the device that supplies the feed to the poultry.[8] For privately raised chickens, or chickens as pets, feed can be delivered through jar, trough or tube feeders. The use of poultry feed can also be supplemented with food found through foraging.[9] In industrial agriculture, machinery is used to automate the feeding process, reducing the cost and increasing the scale of farming. For commercial poultry farming, feed serves as the largest cost of the operation.[2]
^G. F. Heuser (1955). Feeding Poultry. Norton Creek Press. pp. 527–626. ISBN 978-0-9721-7702-3. Archived from the original on 19 October 2014. Retrieved 19 August 2014.
^ abcdJames R. Gillespie; Frank B. Flanders (2010). Modern Livestock and Poultry Production. Cengage Learning. p. 693. ISBN 978-1-4283-1808-3. Archived from the original on 26 June 2014. Retrieved 7 November 2012.
^Pitino, Jen. "Fermenting Chicken Feeds the Right Way" Archived 2015-02-19 at the Wayback Machine, 26 June 2014.
^"Your Guide to Strong Eggshells". Modern Farmer. 1 April 2016. Archived from the original on 16 April 2016. Retrieved 11 April 2016.
^ abGail Damerow (20 January 2010). Storey's Guide to Raising Chickens: 4th Edition. Storey Publishing. p. 96. ISBN 978-1-60342-469-1. Archived from the original on 26 June 2014. Retrieved 7 November 2012. The gizzard consists of strong muscles surrounding a tough pouch filled with small stones or grit that the chicken has swallowed for grinding up grains and other hard feedstuffs. Chickens that eat only processed foods — such as chick starter or layer pellets — don't need grit.
^Gail Damerow (31 January 2012). The Chicken Encyclopedia: An Illustrated Reference. Storey Publishing. pp. 118–119, 135–136 (for grit). ISBN 978-1-60342-561-2. Archived from the original on 26 June 2014. Retrieved 7 November 2012.
^Mark Pattison (2008). Poultry Diseases 6e. Elsevier Health Sciences. p. 550. ISBN 978-0-7020-2862-5. Archived from the original on 26 June 2014. Retrieved 7 November 2012.
^Robert Blair (15 September 2008). Nutrition and Feeding of Organic Poultry. CABI. p. 238. ISBN 978-1-84593-406-4. Archived from the original on 8 October 2021. Retrieved 7 November 2012.
^Malcolm F. Fuller (2004). The Encyclopedia of Farm Animal Nutrition. CABI. p. 68. ISBN 978-0-85199-369-0. Archived from the original on 26 June 2014. Retrieved 7 November 2012.
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