I have three male - three female, Khaki Campbell Ducks, one year old this month. do they give off a musky order when in Springtime mode? We are smelling something musky around the coop. It is protected with electrical wire zapper. we have not seen any predators or evidence of such. Still in the 30's...can you believe it? and still some snow on the ground. The boys are going crazy....seem to prefer one female so much that we had to bring her in the house to protect her and let her get some rest. For some odd reason they are not as enamored with the other two girls. I think we have to get rid of one aggressive Drake Charlie, aka "Drako" who from the time he was a duckling would chase Hugo around and away from the females...but now he's getting just plain mean with the girls as well. Hugo..used to be so sweet but now he is acting out a little bit on Duck Jack...who doesn't have an agressive bone in his body. They are are bright eyes and happy and get a long for the most part very sweetly. For now we put the girl back and put up a day fence between boys and girls. The girls are in serious foraging mode and we wonder if their is a nutrition deficiency. We feed them Mazuri waterfowl maintenance and crush their egg shells in a coffee grinder and sprinkle it on their food. We did not want to give them laying mix as we have heard that compels them to mate and lay...but is it a nutrition thing since they are laying?