Oh man, genetics is a pain in the butt, I breed fish and have done for years, I love them so much that when I move in a couple of weeks I have plans in converting the outhouse into a fish room with 45 fish tanks.
(at the moment I have 11 fish tanks)
When it comes to breeding my fish I have to select the fish I want to breed as they can have inbreeding issues.
Normally I will source my males from one shop and my females from another. or I go to other breeders and select the ones that I want. but even then they can have fry that have defects like missing fins and deformed bodies.
then I have to cull them, which I hate doing but if i don't they pass it on to other generations and that would mean my of spring will have worse defects.
I have made my own strain of endlers through choosing different males and females and they look ace. i have had loads of interest in them and I have sold tuns of them.
But sometimes nature wants our fry to be odd looking. I have had pure black endlers and that's not heard of really. some of the people at my fish club say that is from breeding with the guppy that has caused that.

The way I see it is that if your sheep are healthy and are what they need to be I wouldn't be worried about it, they are there to serve you a pupouse and I think in years to come @jonny-clearwater will father some nice young.
happy steeming @papa-pepper it was a nice read and another good video :)

oh and the art over the sheep makes it look like a zombie sheep hehe

@artonmysleeve.