This is an extreme version of a cat drinking out of a faucet (tap in the UK). It shows the incredible flexibility of the cat and the determination to get what she wants. But on this occasion there was no water.
A lot has been written about cats drinking water. There are a lot of topics such as is tap water bad for your cat or is softened water better or what kind of bowl might you use and so on. Some cats like tap water because it is running.
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