Why should you consider having animal repellents? Every year, close to 5 million Americans, many of them children, get attacked and bitten by a dog. The CDC warns against this common occurrence and suggests using an animal repellent to prevent dog attacks and dog bites. If you carry a dog pepper spray, repeller or stun gun when you are out walking, cycling or jogging, you may be able to avoid this costly and dangerous event. A dog attack can leave a lasting psychological scar especially on a small child who is a victim.