Summary
In this article, you will find the latest veterinary approaches, diagnostic methods and treatment protocols on bolus selection for cows: which bolus is used and when?.
How to Choose the Right Bolus for a Cow?
Bolus selection should be made according to the cow's lactation period, health status, and identified deficiencies.
Bolus Selection Guide by Period
Pre-Calving and Dry Period
- Calcium Bolus: For cows at high risk of milk fever, 12 hours before calving
- Performance Bolus: For general mineral supplementation throughout the dry period
First 24 Hours After Calving
- Calcium Bolus: Prevention of hypocalcemia, muscle and nerve support
- Energy Bolus: For negative energy balance and ketosis risk
- Phosphorus Bolus: When parturient paresis or appetite loss is suspected
Early Lactation (Day 0–60)
- Energy Bolus: Metabolic support during the milk peak period
- Performance Bolus: For general body condition, fertility, and immunity
Late Lactation and Pregnancy Period
- Performance Bolus: To maintain body condition score
- Calcium Bolus: In recurring cases of hypocalcemia
Can Multiple Boluses Be Used Together?
Yes. Calcium and energy boluses are frequently applied together after calving.
Vetkim Bolus Product Family
| Product | Main Effect | Target Period |
|---|---|---|
| VK Pro Calcium | Calcium deficiency | Peri-parturient |
| VK Pro Energy | Energy support | Early lactation |
| VK Pro Performance | Minerals and vitamins | All lactation |
| VK Pro Phosphor | Phosphorus deficiency | Postpartum |
Conclusion
Correct bolus selection is one of the cornerstones of herd health management.