suzan when you say "no infection" has it been checked ? My dog picked up a fungal infection a couple of summers ago that I *think* she either picked up during a particularly rainy week or from the pile of seaweed she had rolled in at the beach. She stunk (weird yeast-y, cheese-y smell
).
Does his head FEEL greasy, or just smell rancid ? Dogs can have seborrhea can't they ?