My hedgehogs are very mischievious, we had a bowl and a bottle there at first, but it seemed that the bottle was being used more, and also, they would dump over the water bowl, somehow drag it to the center of the cage and pile shavings on it so it was buried beneath it. very inventive i thought.:lol: Also, they seemed to just walk in the bowl of water every so often and poop in it. I only use a bottle now, and they seem to empty it pretty fast, so i'm sure they get enough water