In what way do they differ? If I want to eat meat (I do, it's delicious), what is the ethical difference between killing it myself (gun, bow, spear, knife) and

In what way do they differ? If I want to eat meat (I do, it's delicious), what is the ethical difference between killing it myself (gun, bow, spear, knife) and paying someone else to do the killing in a slaughterhouse? I feel like there is no difference, though I'm not sure how I can argue for it. If I were not killing the animal in order to eat the meat, how is paying someone for the opportunity to kill their elk/cow/bird/fish ethically distinct from being an employee at a slaughterhouse, or a fisherman? If the farmer is going to harvest the meat for eating, does it matter who kills it? It seems to me that there isn't much difference, and that they are ethically similar.