Ah, this is an older thread now but nice to see that it`s still being read.
My little robo does play around with the Burgess herbs I bought and I give a little `pinch` of them a few times a week just to give him something different. I can`t actually say if he nibbles them or just likes to pick up a few pieces and then runs around. But they do add a nice meadow scent to his life! I`d be happier if they didn`t add mint though as this seems to overpower the other natural herbs within the packet. The scent isn`t that strong, but I can still smell it when I open the bag to remove some.