Can I Deworm My Cow a Week After Calving?

Deworming is an essential part of dairy and beef cow management, but the timing matters—especially for a cow that recently calved. If your cow gave birth a week ago, you may be wondering whether it is safe and beneficial to administer deworming medication.

Is It Safe to Deworm a Cow One Week After Calving?

Yes, you can deworm your cow a week after calving, but there are a few important factors to consider:

1. Cow’s Health Condition – If your cow is weak, struggling with postpartum stress, or showing signs of illness, it is best to wait until she fully recovers before administering dewormers.
2. Milk Withdrawal Period – If your cow is lactating, ensure the dewormer you choose is safe for milking cows. Some dewormers have a withdrawal period, meaning the milk should not be consumed for a specific number of days after treatment.
3. Type of Dewormer – Injectable, pour-on, and oral dewormers are available, and the best option depends on the parasite load, farm conditions, and whether the cow is on pasture. Consulting a veterinarian helps determine the most effective product.
4. Parasite Burden and Environment – If your farm has a high worm load or your cow was not dewormed before calving, treating her now can improve her recovery and milk production.

When Is the Best Time to Deworm After Calving?

The ideal time for deworming depends on your herd’s parasite management plan. Many farmers deworm cows:

• Before calving (in late pregnancy) to reduce parasite transmission to the calf.
• A few weeks after calving when the cow has regained strength and resumed a normal feeding routine.

Signs That Your Cow Needs Deworming

If your cow is showing any of the following signs, deworming may be necessary:
Weight loss or poor body condition
Reduced appetite or low milk production
Diarrhea or rough hair coat
Visible worms in manure

Final Recommendation

If your cow is healthy and strong, deworming one week after calving is generally safe. However, always check the type of dewormer, follow dosage recommendations, and ensure it is suitable for lactating cows. For the best results, consult a veterinarian to create a deworming schedule tailored to your farm’s needs.