Meloxicam at the Time of a Diarrhea Alert: What Changes in Calf Behavior Really Tell Us

Managing neonatal calf diarrhea involves more than correcting dehydration and maintaining nutritional intake. The disease can also influence activity, behavior, and overall calf well-being. As precision technologies make earlier disease detection possible, veterinarians are increasingly evaluating whether interventions delivered at the first sign of disease risk can improve outcomes. 

One approach involves administering meloxicam when an automated milk feeder identifies a calf at risk of developing diarrhea. Understanding what this intervention can, and cannot, achieve is important for clinical decision-making. 

Does Meloxicam Alter the Course of Diarrhea? 

When meloxicam was administered at the time of a disease alert, little difference was observed in several traditional indicators of disease severity. 

Calves receiving meloxicam showed outcomes similar to untreated calves with respect to¹: 

• Diarrhea duration

• Dehydration status

• Attitude scores

• Milk intake

• Drinking speed

• Average daily gain

• Final body weight

These findings suggest that administering meloxicam at the time of a disease alert is unlikely to substantially alter the progression of the underlying diarrheal episode. 

This observation is consistent with the primary action of meloxicam as an anti-inflammatory drug that inhibits prostaglandin synthesis and inducible cyclo-oxygenase-2 activity¹. While this may help address inflammatory processes associated with disease, it does not directly target the underlying cause of diarrhea or repair intestinal damage². 

Looking Beyond Traditional Clinical Outcomes 

Although major clinical outcomes remained similar between groups, meaningful differences emerged when calf behavior was evaluated. 

During the five days following the alert, calves receiving meloxicam demonstrated: 

• Increased activity levels

• Higher step counts

• More lying bouts

• Reduced overall lying time

These findings are noteworthy because diarrheal disease has previously been associated with reductions in activity and movement-related behaviors^3,4,5. 

Interpreting the Behavioral Response¹ 

Diarrhea can be accompanied by gastrointestinal disturbances that contribute to malaise and discomfort. 

The behavioral changes observed following meloxicam administration may be consistent with a milder behavioral response to disease. While activity measurements cannot directly quantify pain, increased movement and reduced lethargy may suggest that treated calves experienced the disease differently than untreated calves. 

For practicing veterinarians, this highlights the importance of evaluating behavioral responses alongside traditional clinical parameters when assessing treatment outcomes. 

Reduced Electrolyte Administration¹ 

An interesting practical observation was that calves receiving meloxicam were less likely to receive electrolyte therapy following the disease alert. 

This occurred despite no significant differences in dehydration status between treatment groups. 

One possible explanation is that increased activity and reduced lethargy influenced how farm personnel perceived calf health status. Although the exact reason cannot be determined, the finding illustrates how behavioral changes may affect management decisions on farm. 

Practical Clinical Insights 

Meloxicam should not be viewed as a substitute for appropriate diarrhea management, fluid therapy, or supportive care. However, the findings suggest that its value may extend beyond traditional clinical measurements. 

Behavioral indicators such as activity, movement patterns, and lying behavior may provide veterinarians with additional insight into how calves respond to disease and treatment. 

As precision monitoring technologies become more common, these measures may become increasingly useful when evaluating calf health and well-being during diarrheal episodes. 

Key Takeaway 

Administering meloxicam at the time of a diarrhea-risk alert did not significantly influence diarrhea duration, dehydration status, feed intake, or growth. However, treated calves demonstrated increased activity, greater movement, altered lying behavior, and lower odds of receiving electrolyte therapy. These behavioral changes may indicate a milder response to disease and highlight the importance of considering behavioral outcomes alongside traditional clinical measures when managing neonatal calf diarrhea. 

References 

1. Welk A, Cantor MC, Neave HW, Costa JH, Morrison JL, Winder CB, Renaud DL. Effect of nonsteroidal anti-inflammatory drugs on neonatal calf diarrhea when administered at a disease alert generated by automated milk feeders. Journal of dairy science. 2025 Feb 1;108(2):1842-54. https://www.sciencedirect.com/science/article/pii/S0022030224012633 

2. Heller MC, Chigerwe M. Diagnosis and treatment of infectious enteritis in neonatal and juvenile ruminants. The Veterinary clinics of North America. Food animal practice. 2017 Dec 20;34(1):101. https://pmc.ncbi.nlm.nih.gov/articles/PMC7125638/pdf/main.pdf 

3. Goharshahi M, Azizzadeh M, Lidauer L, Steininger A, Kickinger F, Öhlschuster M, Auer W, Klein-Jöbstl D, Drillich M, Iwersen M. Monitoring selected behaviors of calves by use of an ear-attached accelerometer for detecting early indicators of diarrhea. Journal of dairy science. 2021 May 1;104(5):6013-9. https://www.sciencedirect.com/science/article/pii/S0022030221001880 

4. Guevara-Mann D, Renaud DL, Cantor MC. Activity behaviors and relative changes in activity patterns recorded by precision technology were associated with diarrhea status in individually housed calves. Journal of dairy science. 2023 Dec 1;106(12):9366-76. https://www.sciencedirect.com/science/article/pii/S002203022300557X 

5. Swartz TH, Schramm HH, Petersson-Wolfe CS. Association between neonatal calf diarrhea and lying behaviors. Veterinary and Animal Science. 2020 Jun 1;9:100111. https://www.sciencedirect.com/science/article/pii/S2451943X20300247