Ruse and Audace are still really messy with the water in the water bowl. They like to play in it, and water in copious amounts ends up all over the floor. I tried a large vinyl tablecloth, folded a bit, under the water bowl, and that helped, but didn't solve the problem.
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Finally, I decided to put the bowl square in the middle of the kitchen island ... since all three think it's their property anyway! At first I had a little mat under it (like what you see under the food bowl in the second photo), but they'd hook their claws into the mat and move it all around, slopping water as they went. So this is working -- water bowl in the middle of the island, no mat under it. And they've even taken to expecting ice cubes in their water periodically. I guess the cold water tastes good this time of year. I know it does to me!
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Grace has had no problem adjusting to having the food bowl on the floor, where they're used to it, and the water bowl on the island. Sometimes I walk into the kitchen and find her lying on her side next to the water bowl, as if guarding it! Funny girl!!