G.B.
Lots of time together, cuddling, affirming her worth, talking with her about how hard all the changes are and how much she's loved and how you're a family and will always be friends. It is so healthy that she's mad at you guys for upsetting her world, so good she can express it in words! Keep saying you know she's mad, you know she's had too many changes etc., but you're going to stick together and get thru this. Stay home with them as long as you can and build some positives right now. Gotta be really hard on you guys, but it's not her attitude that needs changing.
She just needs some stability and extra love and touching right now. Critical time for her!