Hello,
Seeing feathers lying around doesn't really mean there is feather pulling going on. Some chickens have partial molts at different times, so it is natural to see feathers here and there. Some chickens also molt slowly, so they never really look too bad. Younger chickens have partial molts too as they grow.
Now, if you see chickens with bald spots....Typically at on their backs just above the tail, or on their breast, just below the neck, those are often places where a feather picker likes to pull feathers out. A dead give-a-way as far as who the feather picker is, would be the hen or rooster that has all their feathers, while everyone else has bald spots.
Loss of feathers can also be from mites or lice.....but if your birds look fine, and you're just seeing feathers here and there, I wouldn't worry. It's natural. (I would take a peek under the wings or near the vent to make sure there are no creepy-crawlies.)
Hope this helps,
Sharon