A recent study by the University of Copenhagen reveals a concerning issue with breastbone fractures in laying hens in Denmark, with over 85% of the birds suffering from this problem. The research, which examined nearly 5,000 hens across 40 herds, suggests that the main cause is the breeding for large eggs, which puts undue strain on the hens' skeletal systems. The issue is further exacerbated by starting the laying process too early, as the sternum of young birds is not fully ossified and more susceptible to injury. This finding has led the study's leader, Prof. Jens Peter Christensen, to suggest the adoption of breeds that delay the onset of laying or the implementation of measures to postpone it. The Danish People's Party has called on the Agriculture Minister to launch an investigation into potential violations of animal welfare laws, in response to these alarming findings.