Should chickens eat Himalayan Balsam?

Must admit i dont spoil my girls,  prunings etc get chuked on the heap and then if they want it they can go get it!!

I received a large wooden crate last year and it has become my garden/kitchen recycler for this year,  although it is 4ft high they happily pop in and out of it several times a day just to make sure that there is nothing new in it!

Know there will be a few tuts from some people about letting them do this, but its only what they would do in the wild

At least then it might be good for something!!!