I think at this time of year grass seeds is a possablity.Can get quite nasty if not removed as the seeds can start to grow and cause allsorts of problems.My two dogs took off through a wheat field yesterday,the rough coated dog came out looking like a porcupine but had no seeds in his eyes, but the smooth dog was full of them. Got most of the out with eye wipes, but had to get ear buts for quite a few.He seems fine today but any signs of gunk and he will be at the vets.Hope this helps.Atb Jeffers!