Comment by olooney

The painting is Charlie and Sheba, from the Museum of Bad Art:

https://museumofbadart.org/zoo/

I found it while Googling for a test image for the malicious prompt test, where it was used as the lead photo for this blog post:

https://www.artsy.net/article/artsy-editorial-bad-art-good

There's definitely something eye-catching about it that really makes it stand out from the crowd.