Maybe you should tell the others. They may wonder how she's getting so much attention and put her up at the top of the order. Granted, she may stop getting all those treats so I'm sure she won't be the first one to peep. ;)
For logical, breeding favourites:
Yes. A good breeding hen(s) or Roos deserve the extra attention whether in time or food preparation. If there's one with a special marking I may do so as well, as it may produce some interesting chicks (though I wouldn't breed them back into my main flock)...