I live on a farm with with chickens, ducks and horses. I have had Feral cats around and I have never seen any that cause a problem to any of my live stock. I suppose one could be rabid but I have never encountered one.
What I think is some people just like to Kill. Unless the cat poses a threat, which is a rare case, it is just killing for pleasure. I wouldn't admit that I was a domestic cat killer. You certainly would not be looked upon favorable by your peers. I see it as a cowardly act and so does society. Instead of killing cats for pleasure put in some time in Iraq. Try shooting at something that will shoot back, now that would take some Balls.
I agree with Hunter0924 post: "If someone came shooting at my animals there would be return fire.
GC