Thanks Jane and Louismum
Yes, I thought it must be the saliva and tried to think what she's eaten that's different. She's on the same meals and doesn't ever chew dog chews ( just hides them in her bed
but occasionally,no more than 3 times a week I give her a piece of puffed jerky which is dark brown, wonder if that could be the culprit ?
I am sending for some Kleenface now, thanks again
Jann