Potential new fur child

Mulla is an eight year old rescue dog who has been in foster care. Apparently she is part staffy/kelpie/collie/whippet.
She is with me on a trial basis to see how things go. I just picked her up this afternoon.
The cats are both shut up in upstairs bedrooms feeling stressed and unhappy. I hope it goes well.
I think I’m going to change her name, it’s too much like Marley.