Dogs may exhibit behaviors that can be perceived as jealousy, such as aggression, which can often be in the form of biting or nibbling of the animal or person getting attention over them. This can be an issue in multi-pet households where pets are competing for attention and resources. According to experts, jealous-like behaviors in pets typically suggest boredom or a ploy for attention from their owners. Sometimes, just like people, they can feel insecure, they need individual attention, lots of cuddling, and activities to keep them busy and to keep them from being bored. A lack of resources, social conflict, too small of a space, stress, lack of exercise, and genetic disposition can cause jealous behavior. Pets may aggressively bark, hiss, or growl when owners are greeted or visitors arrive. They may also try to scare off strangers, or exhibit pushy behavior, such as inhibiting another person or animal from moving freely on a regular basis, or pushing their way into a situation, demanding the attention of their owner.