Here's my 2 cents on respectful chicken harvest, pardon me if I don't dress it up nicely, but these are just my thoughts on it: 
 
There are many kinds of respectful chicken harvest and not all of them involve tears, imbibing alcohol and petting the birds or even thanking the birds.  Unless you live where they worship chickens, I can't imagine it being sacred to kill a chicken...that sort of deifies the animal.  It's a chicken and ultimately it's food, whether you have a personal relationship with it or not.  We all have personal relationships with the animals we care for each day, so one isn't more attached than another when it comes to that, no matter who cries and who does not. 
 
All of these emotions and things involved with killing an animal seem to be a result of overthinking things and humanizing these chickens, feeling bad about killing them, etc.  It's never easy to kill an animal, don't get me wrong, done it hundreds and hundreds of times and I would never call it an easy thing to do...and it really shouldn't be.  But it also doesn't have to be this over dramatized event that requires getting soused or crying or any other patting, hugging, cradling and otherwise mauling the poor bird.  It's a hard job...best to just get over it and do it. 
 
The best thing anyone can do for that chicken on killing day is to be calm...they can feel your nervousness, anxiety and fear and feed off it, just like any other animal.  Fake it if you have to, but move with resolve, don't get in a rush but don't linger and paw at the animal, crying and keeping the bird nervous.  Don't chase them around the morning of the kill....go up the night before, remove them calmly from the roost and place them somewhere or somehow where you don't have to chase them around prior to killing.   It's cruel to do that, IMO, putting the bird in that much fear is needless.  Make every step count, give them a quick and clean death and get down to business.  
 
Killing day here is quiet, it's calm, it's slow and it's done with efficiency....that doesn't make it less respectful, it makes it more so, IMO.  I thank God for the animal, I don't thank the animal itself.. I'm sure if it had a choice it would not be dying that day, so no need to thank the bird for a decision it didn't get to make...kind of hypocritical if you ask me.  It also doesn't understand our language, so it's being said more for the human than for the bird. 
 
Crying doesn't do anything for the bird, petting it and holding it, letting absorb your nervous energy and anxiety does even less for it.  If one wants to have a respectful chicken harvest, think of the bird and less of how you feel about the bird.  It's not really about you at that point, but about how you are going to do this last task for your animal...it's a last act of caring. 
 
Anybody who has had animals for any length of time can tell you they feel nervous and anxious when you feel it and they can certainly feel your lack of confidence and resolve, so remaining calm and matter of fact in the face of this last task should be a priority.   Over thinking all of that keeps one from remaining calm and efficient, so best just to get your mind right before you ever step out that door.   Best thing anyone can ever do before killing one of God's creatures is to pray about it to the One who made them all and knows when a sparrow falls, asking Him to take this bird into His keeping and help you give it a good and quick dying. 
 
In the end, respect and care is shown when it's less about the human and how they feel than it is about the animal and how you go about managing their last day.  Now that's free advice, so you can take it or leave it here, but it just may help a few of you who don't know where to start when it comes to killing a chicken.