i have a tank with 2 toads and 1 boreal chorus frog. the toads are doing fine, they are very active and looking healthy. my boreal chorus frog, which lives with the 2 toads and shares a water bowl, (for more info.) but he always hides in a patch of grass or under a piece of bark. is he sick? or is he just scared of the toads, even though the toads are as big as the frog.