Stargate bulls

[PorcPrunus NL]

Can anybody tell me more about STARGATE bulls ?

I see a lot of them popping up in DCS bulletin. Stargate Pendragon was known, but now we have Stargate Robin the Hood, Stargate Centurian, Stargate Sorceror etc

Are these bulls or parents being showed? I can't find showresults. I can't find lineair inspection either.
It looks like all bulls are becoming breeding bull, almost non are castrated? Must be exceptional stock!