Depending on the size, proportions, and demeanor of your dog, it might be able to escape if it’s scared or aggressive. Be careful if your dog stops and tries to back away from you. As you pull on the collar, your dog can dip its head and break free. If your dog backs away, don’t try to pull it toward you. Instead, give it some slack and calm your dog down. If your dog is scared, don’t force it into the situation. Instead, encourage it to investigate and experience the situation in its own time. A martingale collar is recommended as a safe option for preventing a dog from escaping.