North American Veterinary Licensing Examination (NAVLE) Practice Test

The most appropriate treatment for a ruminal drinker calf exhibiting chronic indigestion and rancid-smelling rumen contents involves removing the fermented rumen contents and flushing with saline. This approach directly addresses the potential accumulation of toxic or poorly fermented material in the rumen, which can lead to further complications and ongoing digestive issues. By removing the offending material, the rumen can be effectively cleansed, allowing for a return to normal function.

When dealing with chronic indigestion, it is crucial to consider the specific condition of the rumen and the involvement of harmful fermentation products. This treatment helps restore a healthy balance in the gastrointestinal system and improves the overall digestive health of the calf. Flushing the rumen can also help neutralize any harmful metabolites and promote the growth of beneficial microbes, which are critical for proper digestion.

While other choices may address aspects of calf management or nutrients, they do not directly resolve the underlying issue of ruminal contents and the immediate need for intervention to restore the rumen's health and functionality.