Just got a rat today, well she's not techinally mine she's my brothers but I love her anyways

I'm a little concerned though because since she got home she's been a little sneezy... maybe just the new bedding?... and she's been making a squeaky noise alot, kind of like a quiet guinea-pig sound... I don't think it's her breathing because she doesn't do it all the time.... maybe I'm worrying too much

Other than that she's perfectly healthy and very active. She was climbing upside down on her cage top today

Any advice on her care would be appreciated She's a baby, I don't know how old, but she's a little smaller than a grown gerbil.