Breakfast metaphor question

I heard a metaphor awhile ago that I liked, but I can’t quite remember the exact wording.

It has to do with the difference between being interested in something and actually have a stake in it.

It goes almost, but not quite like this:

In a plate of bacon and eggs, the chicken is interested, but the pig is committed(?)

Can somebody please tell me how it goes and, in a perfect world, provide a cite?

Thanks very much in advance.

The chicken is involved.

awesome. cheers

There are dozens (hundreds?) of variations of the wording of that idea.