It's a cats life

What do you do when it is 23C? Most people sit outside, but not me I still had to do some work. I looked outside my window, and there was a 'strange' cat in the garden. Most people might know my parents have 4 cats. One is trying to move in here, and I think he's going to succeed.

But here's a little quiz: which of these cats did we not chose to come live with us?