Its not uncommon for a rescue to keep a dog separated for a few days. The ones we pull from shelters, go straight to the vets. Full workup, and kept in isolation area for a few days.
It is costly, but keeps us from bringing diseases into our homes, and our dogs being exposed to them.
These dogs need atleast two weeks to decompress, and for to you see their personality. Some of the scared ones need longer. What you see in the first few days can change drastically.
Don't get upset, or feel bad if it doesn't work out. The point of rescue is to find the right home for a dog. Not just a home.
Abbey was my longest foster. I looked over lots of potential adopters paperwork . A good many times, they would have been great homes. But what they wanted in a dog was not Abbey. I would reply to the rescue, its not the right fit for her. She even had a overnight sleep over with the perfect couple, but their dog was not a fan of her. The dog liked other dogs, but apparently not in his home. She happily came back to me the next day.
Abbey was full on fun, with tons of personality. She needed someone that appreciated that in a dog. It took a long time, but she found the perfect home.
Not all those who wander are lost.
Life is just a leap of faith.
Spread your arms and hold your breath and always trust your cape.
Two things define you. Your patience when you have nothing, and your attitude when you have everything.