It also just dawned on me that Kelly Galloup utilizes mallard to get some of his flies to behave a certain way, so I'll have to experiment with that as well.
This works really well. The problem I've had, and he also explains is getting good, symmetrical mallard flank.
He sorts and sells it in his Cougar Packs, but it gets expensive.. Prob ends up being the same as throwing out half of a flank pack in the end though