You're not alone in that. I do the same thing. I even take spiders out of the house and give mice a fighting chance at escape when my cats bring them in.
However, to quote Finding Nemo, "Fish gotta swim...Bird's gotta eat". Or in this case, snake's gotta eat. All it took was one bite from a excrement-covered feeder mouse for me to get over feeling bad for them. They were bred and born to be food, so they are no different than lunch meat.
Then again, my family owns a sausage company. So maybe I've just learned how to be callused when I need to be.
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