Southern by choice
Herd Master
The permethrin is perfect for the task, but I have not been able to find or verify any milk withholding requirement for it. Perhaps @Goat Whisperer or @Southern by choice or maybe @babsbag would know for sure? Maybe someone else? I can't find it listed at FARAD http://www.farad.org/WDIlookup/
Since it is a man made substance designed to mimic a natural substance, I should think that a 5-7 day withdrawal (just to be safe) should be more than adequate.
http://www.livingwithbugs.com/permethrin_pyrethrum.html
The synthetic version (permethrin) is much safer in general and far less toxic than pyrethrum is a botanical insecticide which is natural made from the chrysanthemum plant. The synthetic version cannot be used on cats.
She is improving exponentially in behaviour and now throws only about two short fits per milking and sits quietly for the rest.
I'm not sure how I'm going to work pasture to keep the milk edible, but I have a few ideas and we'll see how it works.
