Unfortunately I'm a self proclaimed expert on allergies- LOL!
Sadly, I've been through A LOT with Maximus in regards to allergies- took us a year to diagnose, and LOTS of money in vet bills. Then it was ME to diagnosed it from my own research (and members/friends on forums). I pretty much learned everything there is to know about food and environmental allergies.
This is my story about what happened with Maximus:
http://www.iheartpaws.com/forums/showthread.php?t=1315This is more recent:
http://www.iheartpaws.com/forums/showthread.php?t=1719And this is what the outcome was:
http://www.iheartpaws.com/forums/showthread.php?t=1906There are more links explaining (instead of me retyping everything) what I went through, but basically I had to go on homecooked because Maximus was SO allergic he almost died from allergies!!!
However, I doubt this is the case for you. There are a lot of tell-tale signs with allergies, both food and environmental. I do believe, from what you've written that it's a problem with the food. Though a yeast infection (as suggested) won't go away on it's own. If you're sure it's not that and that the smell is more than a "Sleep" smell, I'd try changing the food to something with simple ingredients. Perhaps one protien, one grain etc.Â
Canidae is a good food, but Maximus did horrible on the best of kibbles so is now on a home cooked diet (with NO grains or glutens). It really depends on the individual dog.
I'm so sorry you're having these problems, I can certainly sympathize!!! If nothing else, I hope Maximus and my experiences can help others.