When faced with a swelling on a dog's nose, neck or back, we differentiate between bug, bee or spider bites and injury from other pets.Yesterday, Bijou paid too much attention to an insect or spider or was nipped by another dog or cat. The animal bites leave more outward trauma.The insect bites show as bumps and swelling. These can be treated with antihistamines, steroids or antibiotics. Only a severe anaphylaxis reaction is an emergency, but we usually examine all pets and make them comfortable with medication.