Hello, I don't know much about this condition, but I did find this reference under “Croiteach” in my Endnote files. Nisbet, D. I., Butler, E. J., Robertson, J. M. and Bannatyne, C. C. 1970. Osteodystrophic diseases in sheep. IV: Osteomalacia and osteoporosis in lactating ewes on West Scotland hill farms. Journal of Comparative Pathology 80, 535-542. I hope it helps. Regards, Matt Betts