You can check with his pedia mommy if that's normal. Pero meron po ata talagang ganyang cases since iba iba rin po talaga growth and development ng mga baby. Basta at his early age itrain lang rin po sya ng itrain. Hehe
Ask ur pedia parang mejo delay na nga. Pero iba2 nmn dw kc tlga ung timeline nila ng development.