I came home to find my poor little girl hanging upside down in her cage. She was still warm when I got to her and I believe she was still breathing but by the time I got her lose and got to the vet, she was gone. Somehow her foot got stuck in one of the little squares. I use Martins Cages. I was so traumatized, I cried the entire ride to the vet. She almost made it to her 3rd b-day.