You may think that children who have been abused will only feel grateful to have another family, but most children truly care about their parents, and other kinfolk. In spite of being abused, they probably had good family times, too.

One of the biggest challenges of fostering or adopting is to make sure that children never feel they have to choose and that one family is not "better" than the other is. Fostering and adopting is not the same as parenting a child born to you. There may be times when you may need to talk about their birth family or help the child manage feelings about foster care or being adopted.
To help you understand the children in your care, we provide a training program called the PRIDE Program.

Also please see requirements doc

Patience is key.

It takes patience, skill, and training to help children understand that birth families, foster families and adoptive families are different.

Rather than having high expectations about securing the happiness of a child in your care, it's important to encourage them day to day that they are welcome in your home.