Missing one kitten. You don't have to feel bad when an animal isn't a good fit. I've rehomed 4-5 animals in my life. Whether it be rehoming with an elderly who wants companionship or that particular animal's situation calls for a one animal home where they get ALL the attention. What's mind boggling is forcing an animal to live in a setting where it's not ideal- for said animal or you. Think in terms of their health even (and your stress levels) Bottom line is owning a pet should not have a negative impact on your life.