Man, that really sucks. They say here that it takes as much
water to clean the firemen and equipment from the toxins as it does to put out a house fire. Pretty scary stuff.
The label on most medicine/toxins for livestock say to wait two weeks before havesting. Although, if you are processing yourself, you could do one or two and see if the liver is inflamed, that's usually a sign not to eat. When in doubt, ask a hunter as they are really good at checking for health and toxins when cleaning an animal.
But personally, 2 weeks would be a comfortable amount of time to see if they show any symptoms and to clean out the ick that they breathed in.