Attention-Seeking: A dog might try to get between you and another person or pet, seeking your attention and affection.
Pushy Behavior: Jealous dogs may push or nudge the person or pet receiving attention in an attempt to interrupt the interaction.
Whining or Vocalization: Some dogs may vocalize, whine, or bark when they feel left out or when they see another pet getting attention.
Aggression: In extreme cases, a jealous dog might display aggressive behaviors, such as growling, snapping, or even biting, to protect what they perceive as their territory or resources.
Attention to Possessions: Dogs may become possessive of their toys, food, or other belongings when they sense competition.