I killed 6 of them including a "goldie" yesterday from my archer shooting from the ground. You have to have the exact place to stand on the ground and maneuver the target to just the right place. It takes some patience but it can be done.
Edit: (a day later than above post) I just tried today and they wouldn't even notice me so evidently they have been changed. However, I've had days when they were hard to get to move and come back and they go right where I wanted them. But perhaps, like all the stuff that changes everyday, they probably have also. Dang.