Hi. I have a question to ask all sifu here.

My sis sugar glider recently became very afraid of her cage. She wouldnt go down to the bottom of the cage. But once out of the cage, she will be alright. The night before she was still alright. But we are not sure what happen. Everytime we put her back in the cage, she will go up to the cage and when she stare down, she will move her tail around and it looks like a cat with its tail raise. Like she is afraid of something. We already wash the cage and took her to the vet but the vet say she is fine and healthy.

So anyone experienced this before with their glider? Need some help here. Thank you very much in advance.