Once upon a time there were some ducks.

They lived under a bridge nearby.  We had some old bread, because we didn't eat it all before it went and expired.  And some people don't think that eating old bread is a very good idea.  So we decided to give it to the ducks.  Because they aren't so picky about their bread.

 So we went to the bridge and threw it for them.  They seemed pretty happy about the whole thing, until we ran out of bread.  Then somebody else came along with more bread, and they defected.  No loyalty I tell you.

We went sledding instead.  Because that is what you do when your ducks defect.