Cat painting -- real phenomenon or photoshop?
I think this is Dum-Dum the Dummy's cat.
Thanks to Pistolero.
Answer: False. Snopes says photoshop.
In fact, it was a deliberate hoax to see if the actual phenomenon of cat-painting could be inspired by an internet prank.
Ah, well. Thanks to Sharp as a Marble for answering. Turns out it's an old gag.