We have two birth children (both boys) and our youngest (a girl) is adopted. We've only been home for 3wks with her, but honestly its like she's always been here. our oldest son had a very easy adjustment. Our youngest son had a harder time, but alot of his adjustment had to do with us being gone for so long (we adopted internationally and I was gone for 5wks)
Our daughter loves her brothers, they love her. We treat them all the same, although as with all children, some need more attention at times. Our oldest needs help with homework and 'big boy' things. Our youngest son needs lots of snuggle time and play time. Our daughter has special needs (CP) and so she needs the attention for appointments, physical and speech therapy, etc. But that would be the same with all birth children or all adopted children.... as long as everyone is loved and cared for and treated the same, its all good.