Equine therapy can be helpful... because if the child like horses, he/she will want to ride, and horses are very sensitive to emotion. So the animal can have a profound effect on helping child control aggression.

Wow, a lot for you all to deal with.
Not that this is a solution/fix but we have found that a 'weeble' inflatable punchbag (sits on the floor and rocks when connected with) has helped our daughter to focus her frustrations on. Otherwise it's mainly me that will get it! We are looking at diets too, as suggested above. We also do physical things like swimming, cycling, scooting, running/climbing in parks. We just find physical output helps hugely.
Wishing you and yours the very best. X

Thank you so much for this information. I knew about this but didn't realize the exact connection between the horse and its effect on the child. So wonderful.

It may occur when he is frustrated with not finding something or when he can't get his own way. If he asks his Mom to go somewhere and she tells him that they can't go today, he often becomes very aggressive. Having lost his dad at 2 1/2, who was his caregiver during the day, it is just him and his mom, my daughter, in the house. He is 50 lbs. and very strong. She has taken the most of his aggression ,but has hit and kicked students at school.Thank you for reaching out to me. We feel very alone here. Have no contact with any other families like us.

Do you know if there is anything that triggers off the aggression?