Do cats know when you are sad?

Question

Does my cat know when I am sad?

Answer 1

Cats can sense how people are feeling this is because they are attuned to your normal behaviors and any change to that can show them that you are not okay. 

Answer 2

Cats can feel us, too. They can sense if we are sad or not. It comes along with their behavior when going around us. For feral cats, they seem not like the breed ones. They cannot even recognize their names if being called.

Answer 3

the cat can sometimes understand your feeling and sometimes not cats are carnivoures which have instincts, emotions and feelings too