Missing Hair

• Missing localized patches of hair is a symptom of scabies. These are often found on the abdomen, chest, leg and ears.
  
  

Crusty Sores

• Sores that are covered in a yellowish crust form where the scabies mites have burrowed into the skin.
  
  

Itching

• Continuous itching is a common sign of scabies. The scratching is often intense and localized to one area.
  
  

Ear Lesions

• According to the Animal Health Channel, ear lesions are a sign of scabies. These lesions are most often found in the margin of the ear.
  
  

Inflammation

• Inflammation in areas of hair loss is another sign of scabies. The inflamed area will appear red and swollen.
  
  

Hind Leg Reflex

• The Pet Care Center states that the puppy will often scratch the hind leg reflexively when the ear is gently scratched by a human. Scabies mites are almost always along the ear.