My 3 year old girl, is constantly scratching, no dry skin, although she is out of coat having had a litter in April. Otherwise she is fit and well.

Had a skin scrape at the vets all clear, no dry skin, flea dirt or anything I can find and I have used Malaseb shampoo for the last 2 weeks to see if that helps.

Fed mainly raw with occasional grain free food and nothing in diet has changed.

I am at a complete loss and poor girl is clearly uncomfortable.

My other dogs are all fine and they were all treated with Frontline 4 weeks ago.

Any ideas?

Have you changed her shampoo, what you wash her bedding in? Not always due to something they have eaten.

I had a cat with a hormonal problem after having kittens and it resulted in her scratching and getting bald patches it stopped and never returned after a course of tablets.

could it be that the frontline has made her itch? ive had dogs in the past have a little reaction to this with itching it did settle after 3 weeks tho but all dogs are different x

You might also find it's something in the fields/area she is walked...

Malaseb is very strong and if she has a mild case of the itches it might exacerbate the problem.  Try a very dilute solution of Hibiscrub instead - the recommendation is 1:10 but I generally use it weaker than that and it's very effective at removing dust, pollens, and other irritants from the coat.  You could also try giving Piriton which might help - it works for mine.

Allergies can develop at any time and this is a difficult time of year for a lot of people and dogs.  I hope it's temporary :)