That was in 2011. I gave six of the drakes away. One of the remaining two became the dominant drake and wouldn't let the other one near the duck. I lost the less dominant drake to an owl in November that year.
Don't like the sound of the blue feathers. Can you post some photos?
Here is my first flock of Khakis at nearly 6 weeks old in 2011. Eight of these turned out to be drakes.
Here they are again at 14 weeks.
If you didn't specifically order females from a hatchery you will probably have males in the bunch though with only three, who knows? As learycow says, wait another 2 weeks or so and the feathers and voices should tell the story. The males won't quack but kind of rasp and they will develop a...