>>41821196That's a shiny cat, anon. It was born that way.
Just kidding, here's an article about it: https://www.meowingtons.com/blogs/lolcats/the-mystery-of-bulgarias-green-cat The cat liked to sleep in a barrel filled with green paint powder that was, mercifully, non-toxic. The color started fading after awhile, and as far as these articles say, she looks like this now. 