In time, you will learn which (if any) of the people will make friends. I have worked at the same place for 16 years and can't say any one of my co-workers are really 'friends'. I know them pretty well, but they aren't what I'd choose for friends. Most of them aren't interested in animals. They also tend to be backstabbers.

It can take quite a while for employees to accept new people, especially if the person being replaced was there a long time. All you can do is to be friendly yourself, never talk about anyone else in a negative way and wait. If you are doing your job well, it helps.

Maybe volunteer at a shelter or join a club where you find people with similar interests.

And candy never hurts!