Thanks for your reply. I live in Worthing West Sussex UK. I'm not sure about this plant but will find out if it is something that grows here. The vet was concerned about grass horn as the object. He seems keen to do the surgery today but I would prefer a more conservative approach in veiw of her improvement on iv antibiotics providing this doesn't give her unacceptably high risk of further harm. I have recently moved home to the coast and she has been enjoying playing in the sea, could this have been caused by inhaling sea water with maybe a grain of sand? If so I imagine surgery would be inappropriate as the water would have been absorbed and surely it would incredibly hard to identify something as small as sand even under microscopic conditions. Would a bronchoscopy be of any diagnostic value? Obviously much more invasivebut has the advantage being a treatment option too.