There's also the chance that a pet already has a skin irritation such as a fungal infection. Not. Fun. Furthermore, when animals scratch themselves or rub around on the ground vigorously, the outermost skin layer is destroyed, which lets more bacteria or mold into the skin and creates issues such as seborrhea, a smelly symptom often found in doggie ears! Also, it's not directly buggy, but it's possible that the pet is itching because of an allergy to flea saliva, not just the bites.