I saw it when I was eight, sometime in 1950. My father had a print somehow (he worked at rko then) and I and a friend in the apartments saw it on a small pull down screen. I loved it (Thumper!!) and was horrified.
The friend was the one who straightened me out about there not being a Santa Claus.
It was probably useful that I, an only child, then rather cosseted and moving a lot while cosseted, saw that. That was in New York. A year or so later, our having moved again, my mother took me to see documentaries (Bear Country was a title, I think, but also stuff about making silverware, and other subjects I don't remember) at the Evanston Public Library. I still tend to like documentaries. Which brings up Les Blank. I see I'm roving off topic.
To Izzy, the Hollywood ratings happened in response to the Hays Code, which I know even less about. What you or we see now are modifications of the earlier stuff, which some of us also didn't pay attention to.