Do Dogs Feel Left Out

The reason I'm asking this..I have 3 beauties at home and sometimes I feel so guilty because if 1 of the dogs go outside and does their business and come back in, I give them a boney.

But, the one that's still laying on the couch, didn't go outside, and sees his sister come in and eat a boney -- Is that dog on the couch feeling left out?

Do I give that dog a bone, too?  I love my dogs so much, but too many bones are good for them either.  They could eat them non-stop all day long!  I've created monsters!

Am I being a good dog Mommy?