BACK TO THE COWS....
It is well known in UFOlogy that cows are implanted vessels that alien being can raise their young until they are old enough to be brough aboard the ship and be safely placed on life support. Cows are surgically implanted with an alien being and when the semi human baby (small grayish skin. When the fetus is ready and mature inside the cow, a MASSIVE C-SECTION is done and the baby taken aboard. Typical implanting of alien fetises are kept in the cow for roughly 14-20 weeks, then they harvest the youth and preemy care it until a healthy baby.
By the way, almost all UFOs are buried DEEP IN THE OCEANS rarely taking it tot the sky.
I believe the small grey race has been marroned here for 200 years, live under the sea and they cannot get home. To keep their Specie allive, cows are used to create new generations of their race.
When recovering the fetus, weight is an issue in an ALIEN SPACE SHIP as it is for US. Physics are physics after all. So THEY CAN'T RECOVER ALL THE COW CARCASSES because of the major weight they are carrying in hibred cow grown fetuses. So the fetus is just recovered, and bloody cows are left behind - mind you, those recovering the fetus, they are IN AND OUT FAST - just tear the fetus out as fast as possible, hcking the cow to pieces and GET OUT as fas as possible.
Are these alien people here so long that they only way to keep their species alive is to grow new generations through cows. And it's been a few hundred years that they have lived here, marrooned and only surviving through somehow imbreed through cows, have children and stay alive on this foreign planet. For implanting in the NORTH AMERICAN REGIONS originally had to use buffalo for breeding, But they nearly starved to death here when the white man almost caused the extinction of the buffalo/ They were forced to use cows which worked out well on Earth for the Greys..
I believe these are the small greys, they were space suits to interact in our enviroment - it is the large EYES that people claim is really just a viewing port of a space suit - their eyes are much smaller. But they don't mix with humans, they must do cow mutilations while the TALL WHITES are out in Vegas playing Blackjack at the RIO because they can see the numbers through the cards.