My blackjack does this exact same thing. He would always be tipping his water over and would never just drink from the water bowl normally, he was always dipping his paw in and then licking the paw to get the water. I believe it is the running water theory because he would always wait outside the bathroom door if we were showering to go in their and drink from the tub when we were done. Now we don't even fill a water bowl for him, we just always leave the sink running a small bit and he drinks from the sink.. I think this is his favorite