Two thoughts:<p>1. I&#x27;m not sure we&#x27;ve tried. Maybe it&#x27;s possible, but we&#x27;ve never tried.<p>2. If we have tried, and it hasn&#x27;t worked, it&#x27;s possible there&#x27;s not enough genetic diversity in pigs. Dogs have an enormous amount of genetic diversity, which is part of why we&#x27;ve been able to get breeds that look like entirely different species. There are many breeds of cats, but I haven&#x27;t seen any that are as radically different as, say, a chihuahua and a mastiff. We bred tame foxes, but they weren&#x27;t radically different from wild foxes. (The different physical traits, I think, were their ears were floppy, and some retained juvenile markings into adulthood - similar to dogs.)