Me too - although the only animals I ever prepared were rabbits which being small, make less mess, and are easy enough to deal with. I didn't set out to do it - I had a neighbour who used to go rabbiting and as a sign of freindship he presented me with a couple of rabbits every now and then. The idea that I should have just left them to rot or otherwise disposed of them is far worse than chopping them up. If I'd refused the rabbits, my freind wouldn't have understood why. If I'd refused to cut them up, they would have died for nothing. And cooked in a nice caserole, very tasty. It's unlikely these days that it would happen again like that, but I would do the job if necessary.
I also watched my grandmother kill, pluck and gut chickens when I was a kid, so maybe that conditioned me to it at an early age, just as country folk were for a very long time.
I think people who won't look at the way meat is prepared, or find it disgusting or unpsetting probably shoudn't eat meat. It flies in the face of nature to be a pradator who can't stand the sight of some guts and blood. And really it's just putting one's own incapacity or squeamishness onto someone else who will do the dirty work for you.
I suspect there are a lot of people out there who've never even filleted a fish. And actually, that's a worse job than rabbit. But as far as Im concerned, what a person eats and how it gets processed for the table is their own business.