Foxtail Barley is a nasty grass. The seeds have tiny barbs on them like fishhooks so that when they start getting into something, they keep going in rather than coming back out. My pup, Raven, got one in his eye and it was completely behind the eye before we noticed something was wrong. It took a number of trips to the vet and then to a dog opthamologist in Indy before it was found and removed. It still gives me the willy’s to think about it stuck behind the eye. After googling about it, I learned that dogs can get these in their paws as well.