large families/ adoption ?

I have same type of question. We have 3 birth (grown and gone-doing fine), 4 adopted (all boys from age 15-7) and would love to adopt 2 little girls. (dh and I are 44). Have heard some remarks from SW that our family would not be concidered since we have 4 at home. We have an extra bedroom, we have lots of love, we homeschool and I'm a stay at home mom. Just wondering if there are any legal limits or just unwritten SW rule? Thanks!:love: