Went to the vets last night and vet seems a bit puzzled as to why she is so itchy but he has suggested we don't do any further tests until puppies are a little older. He does'nt seem to think there is any connection with the synulox. The only other thing that has changed recentley is that she gets puppy milk to drink now. Maybe this could be what is making her so itchy. Hopefully I will be able to give her less and less of the milk as the pups get bigger so I'll just have to waite and see.