scheduled my 4 year old son a behavior appt to bad it's a month away because my doctor is out on…

scheduled my 4 year old son a behavior appt to bad it's a month away because my doctor is out on medical leave but the nurse mention he might need counseling I'm just wondering how his brother isn't affected much I guess because he's older but he is but he was so young how could it bother him....sigh.... can't answer that question because I never had to deal with it as a child