A little while ago, poor Charlie got a grass seed in his ear, which actually perforated his ear drum.
We were on a long countrywalk, when he suddenly stopped and started scratching his ear. He then started screaming!
We obviously examined his ear, but couldn't see anything (we thought he might have got stung by a wasp.). At home then, he kept scratching, tilting his head to one side and it was obviously very painful when you tried to have a look. When we took him to the vet, they told us that there seemed to be something in his ear and that he'd have to have it removed. It actually turned out to have been a grass seed, which seemed to have perforated his ear drum!
He needed a general anaesthetic to take it out (they gave it to us to take home afterwards
). Poor boy wasn't very happy - he had to take antibiotics and painkillers. Luckily, he's fine now, but it seems to happen such a lot to dogs - I've heard it quite a lot recently - none of our other dogs (including a cocker!) ever had it.