They actually had the tags attached to the skull so not sure why they drilled the holes in the horns. It’s very depressing. They want our money but don’t seem to take care of them. That’s why i brought everything home to do the taxidermy work.
There’s no holes in the back of the hartebeest or wildebeest. The wildebeest still has some hair and stuff on the base as well.
What people don't see many times, is that when your animal goes back to the skinning shed, it often has a hole drilled in each horn which then gets a tag attached, then a tag attached to the skull, Also possibly a tag attached to the hide, and a tag attached to the back skin (if you choose to keep it).
As @buck wild said, they are dealing with a fairly insane number of animal parts and people get pretty mad if even one part is wrong. So, they do this to keep all the parts labeled until shipping.
It is a fairly unfortunate reality, but horns, hides, and skulls routinely come back in pretty rough condition. Some places coat the horns with an oil based insecticide that makes them very black. Some places have had instances of painting the horns all black. Some paint the skulls white to cover bad whitening process. As someone else mentioned, sometimes they come back with a bunch of teeth missing, or broken noses.
It can sometimes not be the amazing feeling you were hoping for when you open the crate and the horns you saw on the animals in Africa don't end up looking nearly as good by the time they hit America. To some degree, I just try to accept that, within reason, it isn't something we can completely control.