I just added 7 girls... and the previous owner has the same strain of Pekins as I do. He's raised ducks all his life and said he's never had a problem with drakes or hens picking on each other/losing feathers. He lets his free-range, as I do, and thinks that the large size Pekins keep everybody in line(they can weigh nearly 22 lbs at 5-7 months of age, he developed the line) even tho' they are docile/never push their weight around. He also has a wide assortment everything from Rouens to Scottish Crested, and more drakes always than girls. Guess it just works out sometimes too! Maybe it's in our water.
I count myself lucky! Even my older ducks don't pick.(course they've had more hens always) They accepted the new ducks in 10 minutes flat. Must have just got all good temperaments. Yep, I've always read more hens than drakes too... that's why I was wondering if my duckies were odd... maybe they're just worn out and happy! ha ha