What Am I?

What Am I?

I come in different colors

I am misunderstood

I have a myth about me

I am most of what shelters are full of

People misuse me

The news only says bad things about me

Magazines have been putting me down since the 80s

I was once used as a nanny

I am not the first to be judged

I am stubborn

I have four legs

I may be intimidated

I have two eyes

I may like to be the one and only

I have two ears

I have a big smile

What Am I?