Watching her muzzle, I could tell she still have both eyes on the target, but now she was aware of the relationship between the gun and the bird, and that made all the difference.
The takeaway here is not that you should aim, but that you have to be aware of the muzzle just a tiny bit. Instructor Gil Ash, who spends more time thinking about shooting and vision than anyone, bucks the traditional “100% visual focus on the target” advice and says it’s more like 95% focus on the target and 5% on the muzzle. Honestly, that strikes me as about right. See the bird sharply, but see the bead – which should be a blur – in relation to the target. That’s my new story, and I’m sticking to it.