My children too are grazers however none of them have eating problems I think at 18 months if any of them was not eating properly I really would stick to the three meals untill they had regulated their eating.

Mine love veg especialy brocolli (spelling) yuck its terrible but they love it ! Carrots raw are great for them too somtimes just a sandwich of homemade bread is good for tea rather than a great big hefty meal.

I am sure I am saying this wrong but there is a saying.....

Eat like a king for breakfast
A prince for lunch
And a pauper for dinner

Something like that anyways.

I cant say I follow it I eat like a king for all three meals as my body tells the world lmao.