Separation anxiety is a common behavioral problem in dogs.
Anxiety is another common reason why dogs become clingy
Stress can also lead to clingy behavior in dogs.
Fear can also cause dogs to become clingy.
Boredom can also lead to clingy behavior in dogs. Dogs need a lot of exercise and mental stimulation to stay happy and healthy.
Loneliness can also cause dogs to become clingy. Dogs are social animals and they need to be around people or other animals for most of the day.
Some dogs become clingy because they are seeking attention.