I remember years ago (20?) when I was keeping Golden Rams... it was hard to find good full bodied ones... they were always a bit longer and skinny... The shape has a come a long way as breeders have crossed back into wild stock to improve them. I kept some Goldens last year and they were spectacular (had to donate them prior to returning to Mexico last winter).
The genetics of the Black/Goldens are fascinating.... Kudos to you folks unraveling it! Thanks for sharing the video.