Duck poop smells terrible... might be the type of feed too... I use Purina Flock Raiser for all my ducks, it's better balanced for their needs and causes a little less stinky poops too... are they getting niacin supplement? They absolutely need it if they're on chick starter for the first 10 weeks... Kennel looks good! You could remove the pan though, it'll just make for a lot extra mess... get a half gallon milk jug, cleaned out, cut a hole big enough for their heads at top of their back height and secure it in one corner filled with water... that will give them the deep water they need to be able to submerge their heads to clean out their eyes and nares and cut back on water mess... just make sure the hole isn't big enough for them to climb into it... replace with new ones as they grow... @Amiga got any more tips, links or ideas, please??