My babies (dogs) are itching/scratching like crazy. They have never had allergies - but for the past couple of weeks, they are scratching like mad!!! When we traveled last weekend, I found some fleas on them - but just a couple - even though they had Advantage on.
They did eat different food while they stayed at my daughter's when I went to Alaska (I took their food over there, but they wanted to eat the food that my daughter's dog was eating

) and I just kept them on that food (dry) because they seemed to like it better than the dry food they were eating. They had been on Solid Gold Wee Bits and now are eating Royal Canin. The ingredients do not seem different at all - but of course, there could be one thing that IS different.
I also changed their wet food as they decided they didn't want to eat the Nature's Variety frozen raw food. I changed to an organic, holistic all natural wet food.
I suppose either of the food changes could be causing the scratching. So, I have gone back to Solid Gold dry to see if that helps (no, they are not happy!).
Rex seems to have a rash on his belly but Rowdy does not and Rowdy is actually scratching more than Rex. Go figure. I have some medicine for the rash that I got for Rowdy last year when he had a similar rash. I put it on Rex's belly last night, but it doesn't seem any better this morning.
I gave both of them a bath day before yesterday in skin soothing bath wash, but that didn't help. I've looked and looked and I can't find any more fleas. They are still scratching scratching scratching!!! ARRGGHH!