Male pomsky (Folsom)

I have a 3 year old as of October male pomsky.
He is intact but up to date on vaccine and preventions.
He is not good with kids.
I have not had a problem with my 9 year old daughter but she is good at giving him space.
My friend asked me to take him because he kept biting her sons.
Other wise he is very affectionate and loving.
Will run if not on a leash or in a fence.
Neutering would help that.
Tri colored with 2 beautiful blue eyes.
He is second generation pomsky and only 13 pounds.