When I was a kid, I once had a greek turtle. She was still very small. I build a structure with grids so I could put her outside to get some sun, fresh grass and a tomato.
One day, I thought, what the heck, the poor thing maybe wanna explore the whole garden. So I put her outside the grid. But watching her crawling slower than a snail kinda tired me, so I got inside house and made me some soda. I also watched some TV for 5 min, until I was reminded the turtle is still out there.
So I rushed outside and thing was gone! Gone. I don't think it has survived the coming winter, so I still feel kinda bad.
I switched to parrots then, but they drove me nuts so I sold them. I don't feel bad about that at all though.
That is my story.