Me, I don't like killing things (I don't think we're SUPPOSED to like, or even be utterly unaffected by, taking a life, even an animal's) but I'm not a vegetarian either (although if I did not live with a very meat-and-potatoes DH I would probably eat a lot less meat). I have had to be firm with
myself and not let
myself keep putting things off just one more day
(BTW, to those who have commented that vegetarians may eventually relapse, it goes the other way as well -- I knew a couple who used to raise *all* their own meat, but finally became vegetarians as a result)
I tried to prepare our oldest son (now 4 1/2) gradually (the other one is still just 1 1/2, I am *hoping* he will not wake up one morning someday and be horrified at what happens to some of the chickens, but I dunno, because he is QUITE attached to them). When he was maybe 1 1/2 or 2, we started mentioning conversationally at dinner that beef "comes from" a cow, chicken meat comes from a chicken, pork comes from a pig, etc. By the time he was 3 1/2 he knew that meat is part of an animal's body that you eat after the animal is dead.
This spring, when he was almost 4 and we were discussing getting broiler chicks, I finally took the bull by the horns and explained that we get meat by killing the animal, that you can't eat an animal that has just died on its own, you have to slaughter and process it properly. He was a bit taken aback but absorbed the information ok and has seemed pretty philosophical about the chickens we've eaten since then. (As in, "gee mommy, <name of chicken> sure tastes good!") I've explained a little bit about how most of the meat you get in the store comes from animals that did not live very happy lives and have scary things happen before slaughter, whereas our chickens get to be happy chickens on the grass in the sun until one day quite suddenly and unexpectedly they are carried over to the stump on the other side of the driveway (and of course not all of our chickens are *going* to be eaten, either).
I'd be careful about delaying the processing of the rooster just because your 5 yr old is upset, though. Unless you *want* to give her veto power on everything you do, it seems to me that it's YOUR decision whether and when to do it, although if she doesn't want to eat the rooster when it gets to the table it might be wise and kind to have the makings of a cheese sandwich available for her
Good luck, hang in there,
Pat