What is NOT a stress behavior in hamsters?

Rey, it's called "glass surfing," where they swim rapidly up and down along the glass. They may also try to burrow into the gravel.

Regardless of what size enclosure you give most of these animals, with the exception of goldfish they need time every day outside and with their human(s). Especially birds, which will stress out and literally start self mutilating if they feel abandoned by their flock!

LIZARDS LIKE A BEarded dragon does this too. our dragon had an adequate terrarium, but still did this.