The Wolf In Shepherd's Clothing

[Catherine]

I had no idea that the blow flies could actually kill a sheep with their infestation. I can see why the problem is treated so vigorously, it just doesn't need to be cruel.

It sounds like there are a number of good products on the market.
Do you have to treat the sheep more than once a year? Does the treatment wash off.
Is this just a sheep problem or do goats have similar issues?