Latest selenium testing results (May 2013)
New rules for 2011 on Selenium labeling in Oregon:
603-058-0140 (11) Adds a requirement to label selenium minimum and maximum when the feed is over 0.5ppm and less than 25ppm. This was in response to livestock producers unknowingly receiving feeds with naturally occurring selenium significantly higher than the animals needs. The regulatory expectation is the selenium minimum will be close to the amount in the feed.
Selenium over 1ppm in sow lactation or gestation diets is now listed as an adulterant.
Letter to the industry about selenium levels
in ingredients and finished feeds in September 2007. This letter advises the industry to guarantee within 25% of the actual amount of selenium present.
Selenium tests January and February 2008
(pdf) This report shows the selenium levels in several ingredients tested in January and February of 2008.
Here you will find the code of federal regulations
that specify how much selenium may be added to feed. (21 CFR 573.920) Veterinarians are not allowed to exceed these amounts in feed even with a prescription.