Can anyone help,every time i come back home from being out with my jrt he doesnt stop rubbing his face and nose on the carpet,he is also very red and sore under his mouth,and for a couple of hours after hes been out he seems to be coughing,does anyone else have this problem,i think and hope it is the stinging nettles coz he doesnt do it if hes just been over fields or road walking,please any advice