poo stuck to new cockatiel vent and hissing?

[happycat]

we just got a new cockatiel yesterday from a really nice bird store and I'm super excited. She's sooo sweet! But I have a couple questions!
She hasn't moved from the back of the cage since she got here. She was in a small carrier from 2 PM and all night last night because my mom was going places and couldn't get her cage ready in time. (And she fell asleep at about 5-6 because of early sunset) She's in her new cage yet but I haven't seen her eat or drink at all. She seems really scared and makes this little hiss noise sometimes. I also noticed a bunch of poo stuck to her tail near her vent. (Not her vent now that I look at her. Her vent seems clean) I've heard this is a bad sign but it could be that she was sitting in her poo last night when she was in the small travel container.

Should I just give her some more time to acclimate or should I be concerned?

 

[happycat]

There were a few poos in the carrier but only one white poo in her cage and its 12 pm which makes me think she hasn't eaten yet.

 

[MikeyTN]

Just give her time to get adjusted, they don't usually go for food right away in a new setting. If your able to bathe her you could just sit her in a tub with some warm water to soak the poo off her tail.