Excessive and Inappropriate Affection.
Giving your dog too much affection, especially to an excited mind makes them needy and unstable. Rewarding a calm state of mind will encourage calm making interactions with you and other entities much more productive. Anxiety is not just a negative emotion, excitement, especially prolonged will make a dog unbalanced and often reactive. So next time you engage with your dog ask yourself what state of mind you are encouraging. A calm dog is much happier in the long run.