Back when I was a kid, my family used to buy sheep and Cows and get a butcher to slaughter them in our backyard, then they would distribute the meat to the poor people in the area.
I tell you though - a 7 year old should not watch that.... It was one of the scariest things I ever seen watching the Cow freak out as the Butcher cut its throat!
in sunna it's good to do the first cut by youself then to let the butcher deal with the dead body of the animal

.. last year in al adha feast i slaughtered 3 sheep by myself (mine, my father's, and, my brother's)... al adha feast is next week,.. i am waiting to kill some more lol..
although i was not scared when watching this when i was a kid i didnt allow my son to watch it last year.. but he is more than 3 and half now and understands everything and i already explained to him how we get the meat when he asked me so will let him watch by himself this year..