Judyh

I have a Timneh Grey that is a little over a year old. She started pulling feathers but not all the way to the skin. She still has down. And she pulled out her tail feathers. I'm not sure if she is really becoming a plucker or if she is just molting. I have other birds and they are molting. She is eating well and playing, doesn't seem to have any other issues. Any help is appreciated. Thanks.