Dream about someone killing a kitten stands for your fears of things that are different. You are ready to rid yourself of the extra weight, negative habits and excesses that are holding you back. There is a situation in your life that has not yet been resolved. Your dream signifies your selflessness and how you put others first before yourself. Someone may be trying to take credit for your work.
Someone killing a kitten dream is a metaphor for someone who is devoid of any emotion. You may be lacking self-confidence in your ability to handle new responsibilities or projects. You need to slow down and set some time for yourself or else run the risk of collapsing from exhaustion. Your dream is a hint for how you or someone is monopolizing your time, a discussion or your finances. You will suffer some sort of loss in your life.
If you dreamt about someone killing a kitten:
You are missing the point. You have a preconceived notion of how things are based on your own limited perspective. This is putting you at a major disadvantage when it comes to communication and general workplace dynamics. Open your eyes.