Managing calf pain has become a growing priority, not just for animal welfare, but for veterinarians, producers and consumers who are paying closer attention to the way animals are cared for. And while calves tend to bounce back quickly after dehorning, research continues to show the physiological effects of pain and inflammation linger longer than the visible signs suggest.
A study out of Kansas State University, published in the Journal of Dairy Science, took a closer look at how meloxicam, a non-steroidal anti-inflammatory drug (NSAID), can help calves through the stress of dehorning. And more importantly, whether giving it before or after the procedure makes a difference.
In the trial, 30 Holstein bull calves were split into three groups - one got meloxicam 12 hours before dehorning, another got it immediately after and the third group received no pain relief at all. Over the course of a week, researchers tracked signs of pain and stress, including hormone levels, inflammation markers and how sensitive the calves were to touch around their horn buds.
Here’s what they found:
“The administration of meloxicam in the MEL-PRE and MEL-POST calves had a considerable impact on physiological indicators of pain and inflammation when compared to the CONT group,” the researchers note.
Put simply: the calves who got meloxicam — no matter when — handled the procedure better.
At just four hours post-dehorning, meloxicam-treated calves had significantly lower levels of cortisol — the stress hormone that spikes when animals are in pain. And five days later, they still had reduced levels of substance P, which is an indicator of discomfort.
However, not every measurement showed a difference. Eye temperature and haptoglobin (a marker of inflammation) were about the same across all groups. But when it came to prostaglandin E2 (PgE2), a chemical that fuels inflammation, the timing of treatment stood out. Calves who got meloxicam after dehorning had lower levels of PgE2 for up to three days compared to those treated beforehand or not at all.
This suggests that administering meloxicam after the procedure appears to extend its anti-inflammatory impact.
“The precise timing of meloxicam administration proved to be a factor, particularly influencing the duration of certain anti-inflammatory effects,” the researchers explained.
In the end, this study confirmed meloxicam can play an important role in easing pain and reducing inflammation in calves after dehorning. While both before- and after-treatment helped, the timing did seem to influence how long the drug’s effects lasted, especially when it came to certain inflammation markers. The difference in PgE2 levels suggests there’s still more to learn about how best to time pain management. But overall, the research supports meloxicam as a practical and effective tool to improve calf comfort during one of the most stressful early-life procedures.
