on a milking doe. My question is...Can I use Seven dust and not throw out milk? Or will it absorb through the skin? Or should I use Cydectin topically? And if so, what's the withdrawal period if any? I can't get plain DE here and I don't need 50# of it so it's not worth me ordering it. Otherwise I would use that. And too, I have both the Seven and Cydectin available now.