I have seen a lot of these and one of my Sa's from 1876 has 3 or 4 notches on the grip. I've also seen notches filed in the metal. My theory is that most if not all of these "kill notches' were added long after the gun was retired from use to use as a selling point or to make the gun more interesting. I don't think anyone who carried a pistol in the old west notched their gun unless mabey some young pup who thought it looked cool. Offhand I can't think of any old guns that I've seen pictures of, owned by famous figures who had 'got their man' with any notches on them. This became popular myth in the early-mid 20th century.
Would you carve a notch in your expensive (at the time) handgun for a horse or critter? I wouldn't and I doubt anyone else would either.
Would you carve a notch in your expensive (at the time) handgun for a horse or critter? I wouldn't and I doubt anyone else would either.