Replacement heifer rearing is one of the most critical investments shaping the future of a dairy enterprise. It takes 22-24 months for a calf to turn into a productive dairy cow, and feeding mistakes made during this process negatively affect lifelong milk yield. Research shows that heifer rearing costs constitute 15-20% of total operating expenses, and 60% of this cost comes from feed expenses (Heinrichs & Heinrichs, 2011). In this guide, we cover all developmental stages, nutrition programs and cost-optimization strategies from calfhood to first calving.
1. The Importance of Raising Heifers
1.1 Why is it important?
The quality of the heifer breeding program directly affects the long-term success of the business:
- Genetic progression: Each new generation increases the herd's genetic potential
- Herd renewal: Continuous need for heifers for annual reform rate of 25-30%
- Economic efficiency: Early calving = Early arrival
- Lifetime yield: Performance in the first lactation affects subsequent lactations
1.2 Goals
| Parameter | target | Description |
|---|---|---|
| First insemination age | 13-15 months | Varies by race |
| First insemination weight | 55-60% of adult weight | Holstein: 370-400 kg |
| First calving age | 22-24 months | Economic optimum |
| First calving weight | 85-90% of adult weight | Holstein: 560-600 kg |
| Daily live weight gain (GCAA) | 750-900g/day | Varies depending on periods |
2. Developmental Periods and Nutrition
2.1 Period 1: Newborn and Colostrum (0-3 Days)
Colostrum (Colostrum) Management:
Colostrum is critical to the life of the calf. Calves are born without receiving antibodies from the mother due to the placental barrier.
| Parameter | target |
|---|---|
| First colostrum time | In the first 1-2 hours after birth |
| First meal amount | 10% of live weight (3-4 liters) |
| Total in the first 24 hours | Minimum 4 liters, ideal 6 liters |
| Colostrum quality | Brix ≥22% or IgG ≥50 g/L |
| Colostrum temperature | 38-40°C |
Colostrum Quality Control:
- Brix refractometer: Fast and practical, ≥22% target
- Colostrumeter: Density measurement, green zone target
- Laboratory: IgG measurement (gold standard)
2.2 Period 2: Breastfeeding Period (0-8 Weeks)
Traditional vs. Intensive Feeding:
| program | Daily Milk | GCAA | Advantage/Disadvantage |
|---|---|---|---|
| traditional | 4-5 L/day | 400-500g | Low cost, slow growth |
| Intensive (Accelerated) | 8-10 L/day | 700-900g | Fast growth, high cost |
| gradually | 6-8 L/day | 600-750g | Balanced approach |
Current Recommendation: Intensive feeding programs can provide 5-10% more milk yield in the first lactation (Soberon et al., 2012). However, weaning management is critical.
Milk Feeding Program (Intensive):
| week | Milk (L/day) | Number of Meals | Calf Feed |
|---|---|---|---|
| 1 | 6 | 3 | Start free access |
| 2 | 8 | 2-3 | free |
| 3-4 | 8-10 | 2 | free |
| 5-6 | 8 | 2 | Min. 1 kg/day target |
| 7 | 4-6 | 1-2 | Min. 1.5kg/day |
| 8 | 0 (cut) | - | Min. 2kg/day |
2.3 Calf Feed and Water
Calf feed is critical for rumen development:
- Start: Free access from 3-4 days old
- Quality: 18-20% HP, 3-3.5% oil, pellet or textured
- Weaning criteria: ≥1.5-2 kg feed consumption for 3 consecutive days
- Water: Free access to clean, fresh water from birth
2.4 Period 3: Post Weaning (2-4 Months)
Goals:
- GCAA: 800-900 g/day
- Full development of rumen function
- Stress minimization
Nutrition:
| bait | Quantity | note |
|---|---|---|
| calf feed | 2-3 kg/day | gradual increase |
| Quality dry herb | free | Clover or mixed |
| Su | free | clean, fresh |
Attention: Weaning stress + group change + feed change should not be done at the same time. Allow 1-2 weeks between each change.
2.5 Period 4: Calfing Period (4-6 Months)
| Parameter | target |
|---|---|
| GCAA | 850-950g/day |
| Weight at 6 months (Holstein) | 180-200kg |
| concentrated feed | 2.5-3.5kg/day |
| Roughage | Free (quality) |
2.6 Period 5: Heifer Period (6-12 Months)
Goals:
- GCAA: 800-900 g/day
- Weight at 12 months (Holstein): 340-360 kg
- Balanced growth without excess fat
Nutrition Strategy:
- Concentrate: 2-3 kg/day (depending on quality)
- Roughage: Free (corn silage + hay mixture)
- Protein: 14-16% HP (total ration)
Attention: Excessive energy intake during this period leads to fat accumulation in the mammary gland and reduces lifelong milk yield!
2.7 Period 6: Pre-Insemination (12-15 Months)
| Parameter | target | Description |
|---|---|---|
| seeding weight | 370-400kg | 55-60% of adult weight |
| Insemination age | 13-15 months | Weight priority |
| Body condition score | 3.0-3.25 | out of 5 |
| GCAA | 750-850g/day | controlled growth |
2.8 Term 7: Pregnant Heifer (15-24 Months)
Early-Mid Pregnancy (0-6 months):
- GCAA: 700-800 g/day
- Avoid over-conditioning (VKS 3.0-3.25)
- Ration based on quality forage
Late Pregnancy (Last 2 months):
- Fetal growth accelerates
- Energy and protein needs increase
- Preparation for the transitional ration
- Target calving weight: 560-600 kg (Holstein)
Last 3 Weeks (Close-up):
- Gradual transition to lactation ration
- Concentrate increase (0.5 kg per day)
- Anion-cation balance (if necessary)
- calcium management
3. Monthly Development Goals (Holstein)
| Age (Months) | Target Weight (kg) | Withers Height (cm) | GCAA (g/day) |
|---|---|---|---|
| birth | 40-45 | 75-80 | - |
| 1 | 55-60 | 80-82 | 500-600 |
| 2 | 75-85 | 84-86 | 700-800 |
| 3 | 100-110 | 88-90 | 800-900 |
| 4 | 125-135 | 92-94 | 850-900 |
| 5 | 150-165 | 96-98 | 850-950 |
| 6 | 180-200 | 100-102 | 900-1000 |
| 9 | 260-290 | 112-116 | 850-900 |
| 12 | 340-370 | 122-126 | 800-850 |
| 15 (Insemination) | 380-410 | 128-132 | 750-800 |
| 18 | 450-480 | 134-136 | 700-750 |
| 22-24 (Calving) | 560-620 | 140-145 | 650-700 |
4. Nutritional Requirements
4.1 Nutrient Needs by Periods
| Period | HP (%) | ME (Mcal/kg) | NDF (%) | Ca (%) | P (%) |
|---|---|---|---|---|---|
| Breastfeeding (0-2 months) | 18-22 | 3.0-3.2 | - | 0.7 | 0.45 |
| Calf (2-6 months) | 16-18 | 2.8-3.0 | 25-30 | 0.6 | 0.35 |
| Heifer (6-12 months) | 14-16 | 2.6-2.8 | 30-35 | 0.5 | 0.30 |
| before insemination | 13-15 | 2.5-2.7 | 32-38 | 0.45 | 0.28 |
| pregnant heifer | 12-14 | 2.4-2.6 | 35-40 | 0.45 | 0.28 |
| Late pregnancy (last 3 weeks) | 14-15 | 2.6-2.8 | 32-35 | 0.5 | 0.30 |
4.2 Roughage Quality
Roughage quality is critical in heifer nutrition:
| roughage | HP (%) | NDF (%) | Eligible Period |
|---|---|---|---|
| Clover (early form) | 18-22 | 35-40 | calf, early heifer |
| Clover (late form) | 14-16 | 45-50 | pregnant heifer |
| corn silage | 7-9 | 40-45 | All periods (mixture) |
| meadow grass | 8-12 | 55-65 | pregnant heifer |
| wheat straw | 3-5 | 75-80 | Limited (fill) |
5. Cost Optimization
5.1 Cost of Raising Heifers
Cost of a heifer from birth to first calving:
| Cost Item | Rate (%) | Estimated Cost (TL) |
|---|---|---|
| bait | 55-65 | 25.000-35.000 |
| workmanship | 15-20 | 7.000-10.000 |
| Health (vaccination, medicine, veterinarian) | 5-8 | 2.500-4.000 |
| Shelter and equipment | 8-12 | 4.000-6.000 |
| insemination | 3-5 | 1.500-2.500 |
| Other | 5-8 | 2.500-4.000 |
| Total | 100 | 42.500-61.500 |
Note: Costs are estimates based on 2024 Türkiye conditions and vary by region and business.
5.2 Cost Reduction Strategies
1. Early Calving:
- Calving in 22 months instead of 24 months = 2 months savings
- Estimated savings: 3,000-5,000 TL/heifer
2. Reducing Mortality Rate:
- Target: below 5% (birth to calving)
- Colostrum management is critical
- Each lost heifer = 50,000+ TL loss
3. Feed Efficiency:
- Quality forage production
- Ration suitable for periods
- Preventing feed waste
4. Health Management:
- Preventive vaccination program
- Early disease detection
- Parasite control
5. Group Management:
- Separation into age/weight groups
- Reduce competition
- homogeneous growth
5.3 Return on Investment
The value of a well-bred heifer:
- Sales value: 80,000-120,000 TL (pregnant heifer, 2024)
- Lifetime milk income: 3-4 lactations × 8,000 L = 24,000-32,000 L of milk
- Calf income: 3-4 calves
6. Health Management
6.1 Vaccination Program
| Age | vaccine | note |
|---|---|---|
| 2-3 weeks | Intranasal IBR-PI3 | early protection |
| 2-3 months | Clostridial (7-8) | first dose |
| 3-4 months | IBR, BVD, PI3, BRSV | first dose |
| 4-5 months | Clostridial booster | booster |
| 5-6 months | respiratory tract booster | booster |
| before insemination | Leptospira, BVD | reproductive health |
| Pregnancy 7-8. moon | Calf diarrhea vaccine | Colostrum quality |
Note: The vaccination program should be arranged by the veterinarian according to the regional disease situation.
6.2 Interference Control
- Internal parasite: Fecal examination every 3-4 months, treatment if necessary
- External parasite: Seasonal control (flies, ticks, lice)
- Coccidiosis: Especially the risk between 3 weeks and 6 months
6.3 Common Health Problems
| Period | Common Problems | prevention |
|---|---|---|
| 0-1 month | Diarrhea (E.coli, Rota, Corona, Cryptosporidium) | Colostrum, hygiene, vaccination |
| 1-3 months | respiratory infections | Ventilation, vaccination, stress reduction |
| 2-6 months | coccidiosis | Hygiene, preventive treatment |
| 6-15 months | Parasitosis, respiratory | Regular check-up, vaccination |
| pregnancy | Metabolic problems, abortion | Nutrition, vaccination |
7. Housing and Management
7.1 Space Requirements
| Period | Closed Area (m²/head) | Open Area (m²/head) | Feeder (cm/head) |
|---|---|---|---|
| Calf (0-2 months) | 1.5-2.0 (individual) | - | - |
| Calf (2-4 months) | 2.0-2.5 | 3-4 | 30-35 |
| Calf (4-6 months) | 2.5-3.0 | 4-5 | 35-40 |
| Heifer (6-12 months) | 3.5-4.5 | 6-8 | 45-50 |
| Heifer (12-24 months) | 5.0-6.0 | 10-15 | 55-65 |
7.2 Group Management
- Age/weight groups: Create homogeneous groups
- Group size: 10-15 heads are ideal
- Mixing: Creates as little stress as possible
- New animal: Implement quarantine
8. Reproductive Management
8.1 Insemination Criteria
Weight First Approach:
- Holstein: Minimum 370 kg, ideal 380-400 kg
- Simmental: Minimum 380 kg, ideal 400-420 kg
- Jersey: Minimum 250 kg, ideal 260-280 kg
Age: 13-15 months (if weight is maintained)
Body Condition: 3.0-3.25 (out of 5)
Health: Vaccinations completed, healthy
8.2 Estrus Detection
- Observation for 20-30 minutes, 2-3 times a day
- Early morning and late evening hours are ideal
- Activity monitoring systems (pedometer, neck sensor)
- Estrus synchronization programs
8.3 Pregnancy Follow-up
- Ultrasound 30-35 days after insemination
- Confirmation by rectal examination at 60-90 days
- Pregnancy registration and expected birth date calculation
9. Record Keeping and Monitoring
9.1 Records to be kept
- Birth: History, weight, parents, difficulty in labor
- Colostrum: Quantity, quality, time
- Weight: monthly weighing
- Health: Diseases, treatments, vaccines
- Insemination: Date, bull, number of inseminations
- Pregnancy: Determination date, expected birth
9.2 Performance Indicators
| indicator | target | Alarm Level |
|---|---|---|
| Calf mortality rate (0-2 months) | <5% | >8% |
| Heifer mortality rate (2-24 months) | <2% | >4% |
| Average GCAA | 800-850g | <700g |
| First insemination age | 13-15 months | >16 months |
| Pregnancy per insemination | 1.5-2.0 | >2.5 |
| First calving age | 22-24 months | >26 months |
Conclusion
Raising a breeding heifer is a long-term investment that requires patience and attention. It is possible to raise productive dairy cows with the correct nutrition program, health management and regular monitoring.
Let's summarize:
- Colostrum management is vital – 3-4 liters in the first 2 hours
- Intensive milk feeding program increases first lactation efficiency
- Insemination decision should be made based on weight, not age (370-400 kg)
- Target first calving age: 22-24 months
- Monthly weighing and record keeping is a must
- Excessive fat negatively affects breast development
- Early calving = Early income + Low cost
Work with your veterinarian and animal nutritionist to optimize your heifer breeding program.
Bibliography
Akins, M. S. (2016). Dairy heifer development and nutrition management. Veterinary Clinics of North America: Food Animal Practice, 32(2), 303-317. https://doi.org/10.1016/j.cvfa.2016.01.004
Godden, S. (2008). Colostrum management for dairy calves. Veterinary Clinics of North America: Food Animal Practice, 24(1), 19-39. https://doi.org/10.1016/j.cvfa.2007.10.005
Heinrichs, A. J., & Heinrichs, B. S. (2011). A prospective study of calf factors affecting first-lactation and lifetime milk production and age of cows when removed from the herd. Journal of Dairy Science, 94(1), 336-341. https://doi.org/10.3168/jds.2010-3170
Heinrichs, A. J., & Hargrove, G. L. (1987). Standards of weight and height for Holstein heifers. Journal of Dairy Science, 70(3), 653-660. https://doi.org/10.3168/jds.S0022-0302(87)80055-3
Khan, M. A., Weary, D. M., & von Keyserlingk, M. A. G. (2011). Invited review: Effects of milk ration on solid feed intake, weaning, and performance in dairy heifers. Journal of Dairy Science, 94(3), 1071-1081. https://doi.org/10.3168/jds.2010-3733
National Research Council. (2001). Nutrient requirements of dairy cattle (7th rev. ed.). National Academies Press.
Overton, T. R., & Waldron, M. R. (2004). Nutritional management of transition dairy cows: Strategies to optimize metabolic health. Journal of Dairy Science, 87(E. Suppl.), E105-E119. https://doi.org/10.3168/jds.S0022-0302(04)70066-1
Soberon, F., Raffrenato, E., Everett, R. W., & Van Amburgh, M. E. (2012). Preweaning milk replacer intake and effects on long-term productivity of dairy calves. Journal of Dairy Science, 95(2), 783-793. https://doi.org/10.3168/jds.2011-4391
Van Amburgh, M. E., & Drackley, J. K. (2005). Current perspectives on the energy and protein requirements of the pre-weaned calf. in Calf and heifer rearing (pp. 67-82). Nottingham University Press.