150 little Calls running/flying around I'd love to see that. How are you going to drastically reduce them sell?X2 as well!
I have never had any of mine get any external (or internal for that matter) parasites, and currently I think we're at approx 150 Call ducks, lol... that number is going to reduce drastically soon, but still no bugs... lots of yard ranging and water time and they keep themselves clean and healthy very easily...