Hello,
I'm new here. I have a moggy called Possum and a Maine coon called Bramble. Possum is from Cats Protection in Nottingham in February 2005 and Bramble turned up on my cousin's doorstep in Cotgrave in October 2008. Bramble has a Facebook page under his own name and Possum has her own...
My cats both do this to test the water level. They are more likely to do it when their water is in a stainless steel bowl, which is probably too reflective for them. I wondered how long this has been going on worldwide as it seems to be a cultural thing, like blue tits pecking through milk...