A dog might try to get between you and another person
Jealous dogs may push or annoy the person or pet in an attempt to interrupt the interaction
Some dogs may bark when they feel left out or when they see another dog getting attention
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
Dogs may become possessive of their food and other things when they sense competition
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