Wow, that sounds full one for a 3year old but then ' most ' 3 year olds i'm around are girl's so i wonder if that makes a difference.
My
DD doesn't use any physical tactics like pushing, etc ... but she can use the grumpy look of expression towards another child which is really rare.
So sorry i'm not much help ... maybe if it's deeply bothering you to ask your GP for some advice as to whether to go to a specialist or not !!!
I was also gonna ask along the line's of Lulu's comment ... Does your
DS go to 3 year old Kinder ??? As it might (??) help him !!