Are they rough spots? You can put some olive or canola oil on them to ease up the itching a bit. And since they tend to lick affected areas, it will be harmless.
We used to put vitamin E on our dog that had "hot" spots too. I just didn't like using it too much becuase I didn't want them to have an E overload. But I tend to be overly cautious when it comes to those things :/
Animal testing is a terrible idea; they get all nervous and give the wrong answers.