He was always loved by people. No matter how old he got, no matter what kind of person they were.

But as a circus cat, more people become less attracted to him. This wasn't his fault, but rather the fault of those who decided that having a pet in the circus would somehow increase their fame and make them more popular than everyone else in the world.

Fewer and fewer people came to the circus and he felt sad.

You saw him being sad. You decide to take him home.