I'm not sure exactly how to answer the question of what is normal behavior. She should be alert and interested in her environment. They usually don't run around the cage all that much, but will certainly move around easily.

We definitely want to figure out if she is eating her regular food and the hay. You are right to be concerned about the freshness of the the food that was in the cage. Guinea pigs require a much higher level of vitamin C in their diet and food that is formulated for Guinea pigs have this higher level, but it will deteriorate with time, so it is always a good idea to buy guinea pig pellets in small quantities because if it sits on the shelf for several months, the vitamin C may not be adequate. I would go to the store and get some fresh guinea pig food and timothy hay for her. Only put a small amount in the cage at a time so you can tell if she is eating it.

From your description of her size, I agree that it sounds like she is quite young. She has also been through a lot in the last day or so, getting a new home, etc., so she may be very nervous and scared. Keep her environment very quiet so loud noises don't startle her. Be patient.

Here are a couple of websites that talk about basic guinea pig care. I think you may find them very informative.

http://www.ahc.umn.edu/rar/MNAALAS/GPig.html

http://www.hsus.org/pets/pet_care/rabbit_horse_and_other_pet_care/how_to_care_for_guinea_pigs.html

If you need additional information, let me know.

Edited by Dr. B on April 24 2006 at 2:40 PM