Dog been scratching for England recently. Have frontlined and also sprayed house with Indorex twice. No sign of fleas or flea dirt etc on dog. I am wondering if it could be a dry skin condition. He is on a very low fat diet due to pancreatitis and Im wondering if this could be the cause although skin doesn't look flaky! Hes been scratching for about a month now, and Im sure that this time last year he was scratching, Could it be down to coat change for winter ?