They do not list a milk withdrawl, but if using the pour on I would give it atleast 48 hours for that horrid carrier (diesel fuel?). Much nicer is the oral drench, clear, no odor; but more expensive and you use 1cc per 11 lbs, still well worth it. I don't think you need to discard milk, but some people give it 24 hours just to be safe.
Think about this with that nasty purple stuff--it is designed to penetrate the hides of cattle, do you want your dairy goat to ingest that? Before the oral drench came out, I used it and hated it, and so did the goats. They spit it, they coughed it, they splattered it every where. I wore it, I inhaled it, and I ingested it! $70+ a quart is a bargain for something that doesn't stink, doesn't make me sick, doesn't stain my clothes, and some of my goats actually like!
Same here, don't think many checked it out as much as I did. "Let the others kill their goats with this, I wasn't using it". But you can't fault it now, it works. Mine also don't mind it, nothing like giving Ivermectin. Vicki