half my siblings are adopted my experience with my four adopted siblings tells me that if a family take the kid in unless the kid has really been traumatized he can become will adjusted but it is really iffy after 5 years of age.
After 5 years old and countless moves between foster homes.
My boy is now 17 and he mostly just does goofy teenager stuff but early on age 6-14 you never knew what to get. His biological half sister started exhibiting signs around 8 and has been a nightmare since 9 and today she is 12 (adopted when she was 18 months). Without going into details lets just say it is a good thing that I earn a decent living and can afford to take off time for her issues. And the school and bus camera videos are classic You Tube material but then you realize she’s your kid.