I changed the bull to be complete yellow with just black eyes.

The only parts where this primitive is used so far are:
- https://library.ldraw.org/official/10648
- https://library.ldraw.org/official/14951

Both parts show the bull in complete yellow with only Black Eyes:
- https://www.bricklink.com/v2/catalog/catalogitem.page?P=60483pb007
- https://www.bricklink.com/v2/catalog/catalogitem.page?P=98138pb169

This is one of the logo prims that went out before I formalized my thoughts on them. I'll have to look at the parts the use it and come up with a solution.

The shape I originally chose was to follow the sticker from the 8169 set, one of the first Lamborghinis. In the meantime, many others have come out and I have no longer followed the evolution.

I think the best thing is:
split the badge in many parts (text, bull, badge, frame and box)
to make a simplified bull01 as proposed by Jens and a bull02 with the internal shape as I had done it.
As long as they are interchangeable in the badge, then everyone decides which one to use.

It might be better to remove all the unnecessary vertices if both should be yellow.

The color of this logo needs to be Metallic Gold, not Yellow. At least for the parts used in 42115 Lamborghini Sian.