I don’t know about anyone else’s dogs, but mine LOVE drinking from toilets... The idea I’ve had is to plant flowers in the tank for the cute factor and probably whatever water runs out from the watering of the flowers will actually add beneficial soil organisms to the bowl where the dogs will drink so I wouldn’t even try to plug the hole between the tank and bowl. When I need to change the water it will be easy to clean... just brush it out and use a bucket to flush it. I’d set it up on a base that allows the flushed water to flow out onto the garden bed.
I haven’t set it up yet because I haven’t decided the location and I‘ve been brewing on how to bring the water level in the bowl higher so my smaller dogs can get to it.
