Hi, thanks for that mollythecollie, thats why i haven't been worried about it too much as its only happend a few times weeks apart and as soon as i stop her she doesnt do it again, but she did do it yesterday and a few alarm bells went off.
She is very healthy in every other aspect, lively, glossy coat, eating, drinking, solid poos, very loving, bright easy to train, there is nothing else that worries me.

Thats a really good idea about recording her, although it will probably be a while before she does it again, but it does worry me that the vets wont take me seriously (not the best vets in the world) so if they don't i will be able to go back with something for them to see.

Many thanks