A clinical case of wheezing associated with rib fractures in a crossbred calf born by natural delivery

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Key Points

To investigate the cause of wheezing in a crossbred calf born via natural delivery with rib fractures.
A 31-day-old crossbred calf presented with decreased appetite and wheezing. Observations included blood tests and CT scans for rib fractures.
Direct laryngoscopy was performed to examine the larynx for abnormalities.
The calf was euthanized for necropsy, confirming tracheal compression by rib fractures.
CT scans revealed non-union of left ribs 1-4 and right ribs 1-2, causing tracheal narrowing.
Necropsy confirmed the rib fractures and their association with right lung adhesion but no other abnormalities were found.
Wheezing was attributed to tracheal pressure from the rib fractures, suggesting potential risks during natural delivery.

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Clinical case reveals rib fractures causing wheezing in a calf, suggesting complications can arise from natural delivery.

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Maezawa et al. (2025) studied this question.

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