Isn't that an impressive coat load Charlie has! I have them in the garden, thanks to Rufus's seed dissemination programme. Cleavers are bad, but burdock which have huge horrid burrs are really nasty, and sometimes hurt his paws or lower feathers so much that he just lies down and feverishly bites at them. My friend had problems because her worker swallowed one and because of the spiny things on it it got stuck. At least cleavers are quite harmless!