Wow there are alot of posts about itchy skin and allergies....
Come on now people...
GET YOUR DOG ALLERGY TESTS!!!! If you suspect allergies insist that your vet give your dog a comprehensive allergy test. Vets usually do not offer them right off. Some vets do not offer them at all...in which case you need a new vet. For some unknown reason vets seem to always go for the trial and error, hit and miss, approach to treating itchiness. If your dog has had a skin scraping...and fungus and other illness has been ruled out...get an allergy test. It is up to you to protect your dogs health. If it were your kid and the doc was just throwing pills at the kid without a real diagnosis you would be making some demands of that doctor...demand the same from your vet!
On of our foster homes personal dogs just had a allergy test....you would believe the things he was allergic to...mice, corn, grass, fly excrement....my point is that a good allergy test covers everything from food allergies to cockroaches.
many allergy cures are as simple as a change of foods...or eliminating certian treats...but you cannot know what to do until you know what the dog is allergic to!!!!
just throwing treatments at your dog to see if it helps will do one thing...make your dog less healthy. As an example...one of our rescues has an allergy to corn. His vets solution was to put him on styeriods when he has an outbreak. Steriods are dangerous. All he really needed was a food without corn. The vet, treating the symptom instead of the illness, risked his liver and kidneys when all he needed was a better quality food. Does not make much sense does it?