(There were about 45 of these jokers in Sept 2017. Jan 2018 update: there are at least 58 cat and dog jokers ).
This first joker is from a deck called Wild! by Peter Woods published by NewtsCards.com out of the UK (I think). It is part of a transformation deck so I think the suits are all embedded in the design. For instance, I see a space on the top of the lion's nose. I think there are three more jokers from that deck and somehow, they seem to have gotten separated in the re-organizing of my deck. This violates one of my principles that all pairs or trios of jokers should be kept together. I'll get on it. In the meantime, this lion is in the cat and dogs section.
There's some significance to Schrödinger's cat which is the subject of the next joker. I think I'll check in on Wikikpedia. " Schrödinger's cat is a thought experiment, sometimes described as a paradox, devised by Austrian physicist Erwin Schrödinger in 1935. Can the cat be simultaneously both alive and dead? It's an analogy for a state known as a quantum superposition..." OK, I'm done. But here's the joker in the cat section since i don't have a philosophy or Austrian section.