There is no USDA accepted withdrawal period is why. No studies have been done on the residual effects of the medicine that suits them to say what amount of days. Most people just use a 2 week withdrawal period except for
@dawg53 and he is still here typing after all these years. Ha, beat you to it.
Someone could have an allergic reaction to the residue or if they themselves have to use "that medicine" for worms, it may not work on them because of resistance being built up from the residue in the eggs they eat. That is the theory. Since Wazine is discontinued, I wouldn't worry about me being resistant to "that medicine" since it will not be used on me anyways If I get roundworms.