Why is one Guinea squealing when she with the other pig?

There could be several reasons why one guinea pig is squealing when she is with the other pig. These include:

- Dominance: The squealing guinea pig may be trying to assert her dominance over the other pig. This is a natural behavior for guinea pigs, and it is not necessarily a sign of aggression.

- Fear or anxiety: The squealing guinea pig may be feeling afraid or anxious about something in her environment, such as the other pig or something else in her cage.

- Pain or discomfort: The guinea pig may be experiencing pain or discomfort, such as from an injury or a medical condition.

- Playfulness: The squealing guinea pig may simply be trying to play with the other pig. This is also a natural behavior for guinea pigs, and it is usually accompanied by other signs of play, such as running and jumping.

If you are concerned about your guinea pig's squealing, you should take her to the vet to rule out any medical problems. Once any medical problems have been ruled out, you can start to work on addressing the other possible causes of the squealing, such as dominance, fear, anxiety, or playfulness.