Oh boy! We just started processing birds this year. It took a while to work up to it. Like you say we are animal lovers also, in addition to being slightly over emotional. My daughter (then 17) made me so proud, I cried. We knew going in that it's what we wanted to do. But getting the guts to do it took extra time because of my anxiety. My hubby will not participate.I have yet to cull my first bird. I am an animal lover of all kinds. We have everything well almost. We have wolfers, coons, turtles, hedges, chickens and ducks. And my husband wants goats. So if anyone has any good advice for a first time culler I would greatly appreciate it. Everyone (my family) says I won’t be able to do it. But I am going to have to. However I am trying to talk myself into it since I have 8 that are ready lol

My suggestion is use a cone, slit the throat and walk away while the jerking is going on. It isn't as easy to cut as they show in the movies and arterial blood sprays everywhere. We tried skinning for our first ones, but you won't have to go that far. My cone is homemade out of a vinegar jug, so free! And I even made 1 out of a 2 liter for smaller birds. We also do it first thing in the morning before they've had anymore food. That gives overnight for the crop and intestines to empty a little for a cleaner cull.
My first time went terrible! Didn't get the cut deep enough and had to do it again.

Our first few times the birds were harder to skin. Come to find out they gain more connective tissue with age. We thought they needed to get big enough for my daughter to reach her hand in. I do the culling and she finishes the processing since bones breaking grosses me out. Now we have started culling at the correct younger age and it goes much faster and easier. Turns out body cavity size was less of an issue when the carcass was more flexible and over all easier to work with. We were worried about having the right set up or anything else. Just do it! The job stinks, but I feel so honored at the end knowing we are providing for our family and NOT supporting big chicken.

You can do it! And you are in the right place for support.
