So my Lucy-Goose does not specifically attack my yarn stash. What she does attack: whatever she sees out of the corner of her eye.
I have many balls of yarn, a few cones of yarn, and various partially completed knitted items all over the couch, behind the couch, and on my desk. Lucy, being the weirdo that she is, has never stalked and attacked any of these things. If anything she takes every opportunity available to lay on top of my arms when engaged in the act of knitting. Of course with the intention of getting attention. On the occasion that I am winding yarn, she will monitor the progress of the swift. Usually there is a tiny bit of yarn at the end that hangs down. The jagged movement of this piece of yarn is usually what catches her eye. The only other time she goes after the yarn is if I mindlessly throw within her field of vision.
Ears perk up. Eyes dilate. Claws come out. Must. Get. Thingy. Must. GET. THINGY!!!!!!!!!