I have a little Bufo bufo juvenile that I found in my sister's rabbit cage. It must have been eating all the flies and other invertebrates. I would have left it there but my sister wanted to keep it as a pet in its own terrarium, she has already creatively named it Poop. So now it's lived in an aquarium, no water except for a dish, lots of cover and gravel, for a month and it has become more tame and completely diurnal. Sometimes it spends hours at the side of its tank looking at the axolotl in the tank next to it, it clearly has no idea of the danger it would get self into if it actually attacked this animal, luckily it doesn't have the chance.