|Cow: Wikimedia Commons|
With our inexcusable human arrogance, we'd say no, this is artificial not natural selection. From our point of view, that's true: we are choosing which bovine genes are to proliferate. But the bovine genome is fighting back, offering up genetic choices for our favoritism. More importantly, from the point of view of cow- or beef cattle-selfs, it doesn't matter what's doing the choosing: the climate, the predators, or the agronomist. However cattle got to be here, they are here, and as long as the environment (that is, McDonald's and Ben and Jerry's) stays favorable, cattledom will thrive. But from the cattle's selfness perspective, it doesn't matter whether its the breeder or the weather that leads it to be so successful. When we enter the Vegetarian Age, things may change, but so do they always for every species in changing environments.
The real difference between how cattle got here and how monarch butterflies got here is that we presume there is no conscious hand guiding 'natural' selection, whereas there is one (us) guiding 'artificial' selection.
But there are long-standing discussions about the extent to which our past evolution channels our future--'canalization' is the classical word for this, making it somewhat predictable. Evolution can only mold things in directions that viable genetic variation enables. If a species' biology and genomes are so complex that only certain kinds of genetic change is viable, then there are only so many ways it can change. That is not a conscious hand, but from the organism's viewpoint, it's not so completely different from artificial selection.
So in that sense it's we who make a distinction between our guiding hand and Nature's. It may be worth ruminating about this, just for the fun of it, because it's a kind of human (self-)exceptionalism by which we create a difference, in our own minds, about how natural change comes about. But 'in our own minds' means a distinction that is the result only of our own selfness. And we tend to deny selfness to any other species.
What would all of this look like to the proverbial Martian, whose assessment machinery may bear no resemblance to 'consciousness' and who thus may not see us as being so separate from the rest of Nature's clockworks?