I agree with Narey too. Yes ideally it would be very nice for brothers and sisters to stay together, but we are talking about very emotionally damaged children here, whose pre placement experiences will have left them with in most cases with behavioural difficulties and a lack of trust in adults. These children are very emotionally needy and it just isn't possible ime for adoptors to take on 3 or 4 members of a sibling group, as they will not be able to give them the attention they need to be able to help them to thrive in an emotional sense. It is very wearing for foster carers and adoptors and this should not be under-estimated.
Many of these children will have had several foster home moves (and i am not saying for a single minute that they have "languished" in foster care (which is an insult to foster carers) but the fact remains, that each move is likely to add to the child's anxiety, confusion and security.
Indeed I was always concerned about adoptors who were thinking of taking a sibling group of 3 or 4 because it struck me that they were being unrealistic in most cases, about their ability to meet the needs of all these needy children.
It is possible and should be encouraged for siblings to maintain indirect contact (by phone calls, letters e mails (maybe) in the technological age, photos etc. Obviously if adoptive families can maintain direct contact, so much the better, but this is very much up to the adoptors. The ground should be laid for the sibs to establish a relationship with each other when they become adults. Of course this isn't always going to be possible but that is the ideal.
Devora you say "most of the time siblings do best together" - there is no evidence as far as I know that this is the case. I'm not even sure if there is any research at all into this issue, because there are so many variables of course.
I think it is important that social workers really get to understand the child and his needs and where the bonds lie between the sib groups, so that the right combination can stay together. I would feel very uneasy about adoptors taking on more than 2 children from the same family. SO yes Narey is talking sense I think.