Ears:
discharge, debris, odor, scratching, crusted tips, twitching or shaking.

Eyes:
redness, swelling or discharge.

Nose:
runny, thickened or colored discharge, crusty.

Coughing, sneezing, vomiting or gagging.

Shortness of breath, irregular breathing or prolonged/heavy panting.

Evidence of parasites in the dog's stool, strange color, blood in stool, or lack of bowl movement (constipation).

Loss of appetite or not drinking as much water as normally would.

Weight loss.

Strange color of urine, small amount of urine, straining, dribbling, or not going as frequently as normal.

Bad odor coming from mouth, ears, or skin.

Hair loss, wounds, tumors, dander or change of skin's color.

Biting of the skin, parasites, scratching or licking the skin frequently.