a survey of 36 minnesota veterinarians suggests early-lactation cows may be the most likely to develop hemorrhagic bowel syndrome (HBS),  also called jejunal hemorrhage syndrome.

According to the results, 61 percent of reported cases of HBS occurred during the first 100 days in milk. The chart below summarizes the results. The survey also revealed that 94 percent of reported cases occurred in second-lactation or older animals.

Although the study includes a small number of respondents, the findings shed light on potential risk factors for HBS. Still, more research is needed to confirm these initial results.