Can a six year old have ADHD?

My child shows all of the signs for ADHD. She has angry outbursts quite often. She throws things out the windows. She’s destructive. She colors on things. She breaks crayons. She plays with her food instead of eating it. She gets angry at her toys, has a hard time listening, etc.

We have taught her how to behave. We try to be as patient as possible with her, but nothing seems to work. What kind of things can trigger these behaviors and how can I help her? I really don’t believe in medicating a child this young, but sometimes I feel so overwhelmed that I’d consider it. 😔