I am thinking of getting some Call Drakes to add to my all drake flock of Cayugas and Buffs but will it be safe to do that? Will the larger ducks harass/hurt the Calls? If not, will they flock together? Also, if I get some some girl Call ducks will the larger drakes try and mate with them? Would that be dangerous to the Calls? Could the Call actually hatch ducklings?