goose grass, sticky buds, bobby buttons .. aka cleavers ...
Hazels leg feathering is currently the animal world equivalent of the soft side of velcro and these little blighters are super attracted to her!
She (and the other 2) also eat the plant, and she will sit and pick them out of her coat to eat. It does concern me that she feels the need to eat something with antiseptic / anti-inflammatory property .. but perhaps they just taste nice!!