I have 4 Khaki Campbell ducks; 2 drakes about 3 months old, the females are full grown. I also have 10 Call ducks in the same run of similar age to the drakes. Yesterday I found one of my Khaki drakes trying to mate with one of my Call ducks in the 40 gallon horse trough they use for bathing. My question is...will he drown her? He had her under the water for a long enough time that I got spooked and shooed him off of her. I work so I can't be there all the time. Do I need to separate the Khakis from the Calls?