Starvation and exposure are commonly recognised as the main factors causing lamb losses. Preliminary research indicates that dystocia is in fact a major factor.
Dystocia is commonly identified as a swollen head and neck, noting that what is often not seen is bruising under the skin which can cause death - but is not easily identified by a external examination.
This article raises questions about the results and looks at where to from here.
Interested and want to know more then just open the PDF