People tend to interfere when it comes to domestic dogs, so dogs don't rely on their hormones as much as wolves, as they tend to be calmer and more docile towards humans. Illness and pain also work this way. When a dog or wolf suffers, it becomes aggressive and agitated because it feels vulnerable and knows that this way humans and other animals will stay away from it, giving it time to heal and regain its strength. The symptoms can also be different; if a dog has something serious, he may walk in circles and be much more active than he normally is. Another internal factor is stress and fear. For example, domestic dogs are now used to living in smaller spaces than wild dogs like wolves, and this means they don't get scared or stressed like a wolf would if it found itself in that situation. If the animal feels threatened they will show it as a