Saikou, thanks for them ideas. To be fair to the vets she goes on average 3-4 times a year, one did mention about a sample being taken but till i read it in your post i had forgotten about it. Mind you it should be on her notes.

The only thing we have sort of worked out is there is a difference if the heating is on, but its on at the mo but shes not sneezing bless her or should i say yet??

I am going to google the things you have mentioned to get a better idea.

Thank you.

l-lysine, found someone else had a thread on these forums in 2008 and they say it is added in some dried foods, maybe this is why she is more sneezy at times compared to others? Seems you can buy it in holland and barrett, is that so? Does anyone else use it for this?
Thank you again.