safe plants

I’ve been trying to find a good plant to grow up on side of the exterior of my chicken run for looks but also to add shade for the summer. I have Love In A Puff seeds (Cardiospermum halicacabum). I can’t find anything online about it being toxic, but also can’t find anything in reference to...

And is it safe for my chickens? The girls have been free-ranging so much that they have neglected the landscaping inside their run - and this pretty little weed is taking over! They are not eating it, so I'm not worried about that, but I'd like to know for sure... It blooms in the late...