Randy, your simplest solution is to use the wads that you usually do and load deformed shot or 'Plumb Bago' as the Europeans call it. Any soft or chilled bird shot is easily deformed on an old cookie sheet w/sides [to keep it contained while deforming it] w/a suitable bludgeoning devise. It doesn't need to be fancy; most anything of a hard metal with some heft will work and it does not take much force, just a few sound raps will usually do. It's easy enough to inspect your progress. Deformed shot does not drop well in most loaders, so it's easier to make a dipper from a cut down shotshell w/a spent primer still in place and use that, if nothing handier is available. You can wire or tape it to a handle to make using it easier, if wished. Spreader loads made in this fashion are VERY effective and simple to fabricate. I have found them much more effective than using some of the specialty wads marketed for 'spreader loads'. You can verify that for yourself if you have access to a grease plate. I've done that and used them on occasion for both close in sporty clays target presentations and in the field w/very satisfying results as the patterns bloom much quicker than using specialty wads. And, yes, you can get patterns to open more than one constriction, predicated on how flattened the shot is. Just Saying.
Simple yes, and if shooting clay maybe ok. However if shooting game I would not.
Orvis used to market flattened shot spreader loads, while they worked they really tore up birds compared to round shot. Moreover they seemed to stop midway through the breast more often than round shot and definitely caused more feather draw into the wound channels.
Spreader wads and inserts is a better way to go with live birds.