Do a search pal there's some good threads ! Two of mine had it passed within 14 days ! Cough medicine is supposed to help them ! I just let them ride it out ! As I heard nothing cures it just helps symptoms mine are fine and working a month on no probs ! Just keep a close eye on the dog though as there's lungworm becoming common and plus as you said could be something lodged, but I wouldn't think you would have a problem with seed this time of year in my opinion! But if one gets it the rest will its easily caught ! But do a search there's some good advice