FDA: Alternative to surgical castration for pigs approved

Because intact male pigs eat less feed and produce more pork there is potential for an  incremental reduction in the carbon footprint by as much as 3.6 percent (measured in CO₂ equivalent per kilogram of pig live weight) versus barrows.

“Improvest creates an opportunity to capture more value from male pigs that didn’t exist until now,” said Jim Bradford, DVM, director, Team Lead, Improvest, Pfizer Animal Health. “Male pigs are given Improvest later in the finishing phase to manage boar taint, so they’re able to grow to their full intact male potential, and do it more efficiently.”

Approved in 58 countries

Pigs are given Improvest via injection. The first dose primes the system and should be administered no earlier than nine weeks of age. The second dose should be administered at least four weeks after the priming dose.

Pigs should be sent to market no earlier than four weeks after the second dose of Improvest to allow adequate time for reduction in the compounds responsible for off odor in pork. Marketing pigs on the Improvest program more than eight weeks after the second dose may increase the risk of off odor in pork. Only trained, certified technicians will be permitted to administer the product as part of the quality assurance program.

As the product is gradually introduced, Pfizer Animal Health will work with veterinarians and their producer clients to help them adopt new nutritional guidelines and best handling practices to optimize growth for intact males.

“This gradual approach provides the time needed to ensure a coordinated food chain effort, and gives processors and packers time to integrate and optimize this into their systems, as well,” Bradford said. “We want to ensure the best Improvest program experience for everyone – from farmers to meat packers, processors and retailers, and, ultimately, to consumers.”

Important safety information
Improvest should not be used with female pigs, barrows or male pigs intended for breeding. Special care should be taken to avoid accidental self injection during administration of Improvest. Accidental self injection could negatively affect reproductive physiology of both men and women. Therefore, pregnant women should not administer Improvest and women of childbearing age, as well as men, should exercise extreme caution when administering the product. There is no risk, however, of these effects on an individual who consumes pork from pigs given Improvest.