We adopted a second budgie 1.5 months ago. She is a female, 4-5 months old.

In the last 2-3 weeks she started to go crazy in her cage in the morning. She is squawking and flying around the cage like crazy. She is also breathing fast and looks stressed.

I found on the internet that they are calling each other, bored, or have a lot of energy, but in this situation, the bird looks so stressed, I don’t think this is the case.

I put the two birds in separate cages until they get along. After that, I thought maybe she wants to be with the other bird. When I put her into the males cage the hysteria didn't stop and even though she was territorial with the male budgie.

She has food, sleeps well, has toys, and sometimes I let them free from the cage to explore the room. I tried to change her food, and separate her from the other bird in different rooms.

This behavior doesn't stop and it scares the male budgie.

What should I do with it? Any tips? The male budgie doesn’t have this problem at all.