how come my costal keeps pooin in his water bowl

[Snakelove]

move the water to cold side. and be happy that it poos in there. i was so thrilled when i found my bredli pood in there once. cleaned it out properly afterwards and put it back with fresh water.

 

[RCW74]

My Bredli does it regularly in her water dish. Great to clean out, but man does it smell worse than on paper substrate!! I therefore clean it out ASAP. Besides, she looks indignant with me and herself after she's done it