Piperazine
There is one study looking at piperazine residues in the eggs of treated hens. Piperazine is approved for use in laying hens in Australia and Canada at doses ranging from 130 to 200mg/kg/body weight one time and a zero day egg and meat withdrawal. In the US, since there is no tolerance, this withdrawal needs to be extended.
Source: http://www.usfarad.org/drug-wdi-faqs.html
-Kathy
There is one study looking at piperazine residues in the eggs of treated hens. Piperazine is approved for use in laying hens in Australia and Canada at doses ranging from 130 to 200mg/kg/body weight one time and a zero day egg and meat withdrawal. In the US, since there is no tolerance, this withdrawal needs to be extended.
Source: http://www.usfarad.org/drug-wdi-faqs.html
-Kathy