This is another puzzle that has been sitting around for a while waiting to find a place in the queue. Heck I had to remember how to solve it as I was trying to get it ready to go.
I doubt they will remember it, but KayW and lbray53 helped me test and refine this one. Of course they may just pull a Mission Impossible on me, "As always, should you or any of this meta be wrong or crunchy, the test solvers will disavow any knowledge..."
Difficulty? Hmmm...I'm going to say Calico to Persian because you will have to see the "trick" to solve. Of course once you do it is pretty straightforward, but noticing what I'm up to might be a challenge for some depending on your levels of experience with the subject. Still, this is nothing that is way out in left field so I expect most will find their way.
Kitten
֎ Calico
֎ Persian
Puma
Lion
I will try to remember to post nudges this week, hopefully I can keep my mind in the game.