my guinea pig sick

Question
i have adapted a guinea pig 3 days ago.the 3rd day night i saw her behaving odd she could not walk properly,she was not eating anything .when i adopted her,she was healthy&fat&playfull.she became thin and her legs became streched.

Answer
Mithil,

Make her an appointment at a specialist small animal or exotic pet vet as soon as you can, or take her to a general emergency vets. I don't wish to alarm you, but guinea pigs' health can decline very quickly and these symptoms don't sound good! It sounds as though she could have a stomach blockage caused either by an infection or by something she's eaten, and if so, she'll need expert help immediately.

Good luck!
Jenny.