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Article published the February 4, 2021
The laying cycle of a chicken flock usually covers a span of about 12 months. Egg production begins when the birds reach about 18-22 weeks of age, depending on the breed and season. Flock production rises sharply and reaches a peak of about 90%, 6-8 weeks later. Production then gradually declines to about 65% after 12 months of lay. A typical production curve for a laying flock, showing changes in ...
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Article published the August 24, 2020
Occurrence IB has been reported as a disease only in chickens. All ages of chickens are susceptible to infection, however, clinical disease severity varies. IB is considered to be worldwide in distribution. The incidence is not constant throughout the year, being reported more often during the cooler months. History The disease was first described in 1931 in a flock of young chickens in the U ...
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Article published the March 25, 2019
The poultry industry continues to rapidly expand throughout many regions of the world. World production of chicken and eggs is twice the level of only two decades ago. The genetic potential of the broiler, breeder, and egg-type layer has changed dramatically, resulting in a higher producing but more fragile chicken. Thus, the commercial chicken of today requires improved management practices. In t ...
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Article published the October 26, 2017
Intestinal parasites (worms) are very common in chickens in the backyard type poultry flocks. The presence of a few parasites does not usually cause a problem. However, large numbers can have a devastating effect on growth, egg production, and overall health. The concentration of parasite eggs in the chickens environment is one factor which plays a major role in determining the severity of the inf ...
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Article published the October 2, 2015
Fertile egg production and incubation and production of broiler meat are both an art and a science. People have taken full control of incubating fertile eggs by artificial means to supply the increasing world demand for poultry meat. It is estimated that worldwide more than 35 billion fertile broiler eggs are incubated annually. If eggs were still incubated naturally and broilers raised in small b ...
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News published on March 26, 2015
USSEC consultants Craig Coon, professor of poultry science and nutrition at the University of Arkansas, and Gary Butcher, professor of avian diseases at the College of Veterinary Medicine, University of Florida, recently visited Tunisia. Dr. Coon and Dr. Butcher led a Poultry Diseases and Nutrition seminar and made field visits to a National Reference nutrition laboratory, feed mill, broiler farm, ...
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Participation in Forum on September 23, 2013
Dear Dr. Greg, I had worked with recombinant vaccines in my laboratory for over 10 years against a number of agents-- ILT, Gumboro, Newcastle, Marek's. These worked very well in the laboratory, giving complete protection against contolled challenge. However, in the field they were a disappointment in that small disease breaks consistently occurred. Recently in the state of Florida (USA), the reco ...
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Article published the June 14, 2013
Protecting poultry against disease involves more than simply administering preventive vaccines. Disease prevention is a complex and multifaceted process. Vaccine quality is commonly blamed when a disease occurs; however, there are usually other factors responsible. A comprehensive investigation is often called for to identify the cause(s) and to resolve the problem. Commercial poultry farms have ...
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This member gave a presentation on May 24, 2012
At the following event:
XXII Central American and Caribbean Poultry Congress
Participation in Forum on October 17, 2011
Excellent paper about poultry health. Well balanced and practical. Gary Butcher
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Location:Gainesville, Florida, United States
Profile: Academic / scientific
Occupation: Doctor of Veterinary Medicine
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