Depression is a treatable disease. Once a diagnosis is made, medication may be recommended. I think that clearly our clinical experience suggests that young children respond to the same sets of medications that adolescents and adults do. Counseling modalities may differ for this age group, however. Therapy may incorporate play or art to demonstrate to a child the ways in which conflict can be resolved or dealt with appropriately.
Parental involvement is an important component of counseling, particularly with young children.
You might be angry at your child if you thought they were misbehaving.