"Sweeping the dogs" is another red herring. I don't sweep my dogs when closing my hammer gun or any other gun.
It seems to me that the biggest safety virtue of a hammergun is that if the hammers are not back, it is NOT going to shoot either accidentally or on purpose, and that carrying one around cocked and broken open sort of nullifys that advantage. When I hunt with my hammerguns, I want them uncocked except when I am ready to shoot. The shorter the time the hammers are back, the shorter the window of opportunity for any mishap.
I cannot pull both hammers at once on any of my guns but I still want two shots when the birds get up. I believe I am safer if I wait till the dogs point and I am in position and then cock the gun, than I am trying to juggle the open gun, not spill the shells and slap everything back together in the excitement of the covey rise. That way I am devoting my entire attention to keeping the muzzle pointed in a safe direction till I shoot.
Maybe this shell chewing point is worth considering though if it will allow you to carry the gun open and pointing up in the air as you walk in to the point and then close it at the rise without sweeping the barrels up through the ground the dogs are occupying. Do you chew up a batch prior to the hunt or is the proper form to chew a shell at a time as you reload? Does this cause a rust problem in your chambers?
'Sweeping the dogs' is no Red Herring, in my opinion, any more than a trap shooter turning around with a loaded gun and sweeping the audience. And I'll bet any range-masters around here would agree with me on that point. Well, opinions do differ, but that's mine..Geo