My doxie had this same thing. Turns out he was having an allergic reaction. Some doggie allergy meds from the vet cleared it up. I still haven't figured out what he is allergic to as he didn't get it back after the meds.
__________________  Heather, mommy to  Drake (7 yr old son),  Triss (yorkie),  spike (dachshund),  ash and misty (my cats), and a baby on the way due Oct 1st!  |