When it comes to strange pet behaviors, drinking out of the toilet may very well be at the top of the list. Oddly enough, some of the reasons for a pet drinking out of the toilet are rather sensible—at least on the surface. Dr. Jennifer Coates, a veterinary advisor with petMD, puts it this way, "When was the last time you dumped and scrubbed your pet's water bowl? If you can't remember, chances are the water in the toilet is more appetizing than what's available in the water bowl!"
The fact that your toilet is running (complete with sounds of flowing water) may very well speak to the primal nature of your pet to seek out running water in the wild. According to Coates, running water tends to be a healthier choice than stagnant water in a natural setting. "Perhaps some of our pets have an instinctive pull towards running water and that's why they're attracted to water that 'moves' in our homes," she says.
Coates has another hypothesis: "It could be that some pets prefer the relative solitude of the bathroom. If their water bowl is in the middle of a chaotic home, they might not feel comfortable settling down to drink at that location," she says.
So how can you cat-proof your toilet? Here are a few tips from Wiki-How.