Its probably true of most animals. I raised a couple of pigs and we intentionally never fed them any meat, even though they'd probably eat it, because we didnt want them to get a taste for it
> You don't want to be the farmer who falls over in his pig sty.
This is the real reason for the panic when Dorothy falls into the pig sty at the beginning of the Wizard of Oz. The pigs would crush her and eat her. (But in the movie, her dress doesn't even get dirty!)