We used to raise goats and chickens. We did slaughter chickens for our own food but never got up to the volume it would have taken to feed the dogs, although that was my plan & dream. I don't feed raw for the very reason that factor farmed, mass slaughtered meat is SO dirty and unhealthy. (Fecal soup, anyone?)
Having seen the difference in my chickens, who were free range on ten acres, the difference in their health, their eggs, the meat ect ect. Vs images from these huge chicken barns where they clean the barn ONCE, after each meat bird flock goes to slaughter. I know what my coop smelled like when it needed a muckingk which we did a minimum of once per week and they were only in there at night! I am digressing. Factory farms gross me right out, I have seen testing showing the difference in salmonella levels of pastured organic chicken vs factory chicken.
It is my dream one day to raise meat for my dogs. We have 40 acres now. Someday. Someday.
I didn't find the butchering the chickens nearly as bad as I thought it would be, we had a good method. We never killdd any goats. Not sure I could do that, though all those bucklings would make for some fine meat