Info on our girl

This morning I awoke to a very detailed investigation report about our girl in my email inbox.  I can envision her life a lot more clearly now.  I also learned when her birthday actually is.  We were unsure on her exact age and now we know she will be turning six in three more months.  We knew she was anywhere from four-six years old.  Our youngest child is five soooo... can we adopt "slightly" out of birth order?  That's our newest concern.  We are okay with it, but will our social worker be okay with it?  We will know in a couple days.