I had clipped the wing of my barred rock, and I can see that she is growing in the new wing feathers, but the old clipped ones haven't fallen out (like they did on the other barred I clipped)... I tried this morning to pull one - I even grabbed on and let her try to pull away (which is what she wanted to do), but the feather stayed tight. How do I help her molt these wing feathers? She's almost finished molt otherwise, I think. Any advice appreciated!