A Joke about Cat

Usually, before meeting with my thesis advisor, I send him some pictures of the work I've completed.
Coping the screens and pasting them to my notebook Desktop,
I then attach them to the email for my advisor.

This week, I attached three pictures which are supposed to be the result of a tool I designed.
But when I arrived the office of my thesis supervisor,
he told me that the cat is really cute.

Yes, I did something stupid, sending the cat picture instead of the result I should email.
Fortunately, the cat picture was one of them, and the other two were correct.

I received the email by my advisor after getting home.
The content was really funny,

"I am pretty sure that the cat is not part of the application, no
matter how cute it is :-)"

Where are the cat pictures from?
They are sent by my sister who has 7 cat right now.

The picture below is the one that I sent to my advisor.
It is still a baby cat, born at about 20 days ago.