I do not believe that in anyway when they say its from close breeding or inbreeding
Last year it was from an unrelated shetland ewe and shetland ram, this year its out of a mule ewe and a charmoise ram.... so very unrelated
Photo is of the shetland ram lamb last year, the one this year is actually more affected, penis is just a smudge on the belly, and the urethra is exposed all the way along, the pee drips down its backside and down both back legs and looks horrid.
When I asked someone if they ever had the same they said the lambs generally die of flystrike as the flies lay eggs along the urethra underneath as the chemical doesnt stay there due to all the pee

The ewe of the lamb this year had a bad prolapse which I put back in and stitched so she is a cull anyway, no idea if that can be related but the ewe last year didnt have a prolapse, she just had bad feet (so she also was culled anyway)
The lamb this year is huge and is a lovely shape, so its a shame really