He looks beautiful and fully feathered.
Yes, Quakers DO tend to pluck out of stress. They are very busy birds in the wild and that fussy energy has to go somewhere. My last Q was a builder and spent all day arranging and rearranging sticks, straws, and toys. My current boy Q is scared of new objects but chews his nails. When anxious, he will barber. He needs to be pet and cuddled each day or he gets upset and chews his feathers.
Romeo is adorable! Maybe you could give him treats of seed; like trick train and use sunflower as a reward? My boy likes avicakes but only eats the seed out if them. Also when they’re growing lots of feathers, a little bite of hard cheese, cooked egg, baked fish or chicken gives extra protein.
What a handsome boy.