All 3 of mine were clipped when I got them. One at 6 weeks, one at 6 months and 1 at 1 1/2. I let all their wings grow out. My 6 week old flies effortlessly and always has. My 6 month old was taught to fly by my youngest son, she is an amazon & is heavy, she can fly well, but she is like a missile when she flies, you gotta duck or get hit! LOL. MY year and half one took almost a year to grow out, she learned to fly but but was difficult. She still forgets she can fly at times. They are now 15 years old & 11 years old. they never plucked due to flying. the 6 week old that is now 15 is started to pluck, I feel it is due to stress and she is the lowest on the totem pole and gets the least amount of attention due to my work schedule and the others not letting her get much attention from me. I am quite sad about that, she does get special things and time out the others don't get, but it doesn't seem to make up for it.