You ask about if and how to keep them.
I only see posts of toads in bad environments, wondering why it is not eating.
I read about experiments where you throw an animal living on land into an aquarium,
now you are wondering what happens if you cut legs off of animals because they jump.....
In my point of view, you are not all that compassioned with animals, lack of empathy may be a problem in this case?
Like i said, scientific research shown this is one of the early signs of more tragic things that might be happening in the future.

Empathy - Wikipedia, the free encyclopedia