Need to quantify a bit , I have seen 2 ewe lambs like the post and maybe 10 wether lambs with no anus out of maybe 40,000 lambs , so it really shouldn't be that common . The 2 ewe lambs ,1 wether and 2 cryptorchid ram lambs ( no decended testicles ) were all fathered by the same ram in his first time use , so culled at a £700 loss