Raising healthy dairy calves requires maximizing the calf’s level of immunity against disease while minimizing its exposure to infectious diseases. However, there will still be times when calves will become sick. Can you identify the sick calf?
Diarrhea, or scours, accounts for over 50% of illnesses in preweaned calves, contributing to 32 percent of all deaths in calves (USDA NAHMS 2014 Preweaned Calf Component Survey). Scours itself does not usually kill the calf. Rather, the calf will succumb from the dehydration and electrolyte imbalances which follow. Early identification of affected calves and early and aggressive treatment with fluids and electrolytes is the most successful way to treat scouring calves.
Providing an excellent environment is a key component in successfully raising calves. For calf housing the environment includes the calf’s resting space, feeding, and walking surfaces. A clean, dry resting surface ensures a hair coat that helps insulate the calf against the cold, low air temperatures,and sudden changes in temperature.
Animal care and welfare starts on day one with the newborn calf. Healthy calves are the cornerstone of every dairy operation, not only providing the future genetics for the herd but healthy calves are also important to the vitality of the dairy farm.
Heifers represent the future of the dairy operation, bringing genetic progress to the milking herd. Raising heifers is costly and improving efficiencies in raising them can have a financial impact on the overall profitability of the dairy business.
Superior calf performance begins during the birthing process in the maternity pen. Based on the 2017 USDA NAHMS Survey, five to seven percent of all newborn calves are stillborn or die within the first 48 hours. To improve calf survival after birth, we must follow practical, consistent calving protocols and provide a clean, dry calving environment.
As operations grow, or focus more on the milking herd, it has become a necessary component in moving newborn calves from the farm to a separate calf raising facility, some being out of state. Handling and transporting these calves can be stressful. However, there is limited research on the impact of long-distance travel on a newborn calf’s welfare.
Hoof health is essential for not only the overall health of the animal, but also for her welfare. Digital dermatitis (DD), or hairy heel warts, is an extremely painful condition for dairy cattle, reducing their ability to walk to and from the milking parlor, or to the feed bunk. Based on USDA NAHMS 2017 data, 16.8% of all cows and 2.6% of bred heifers have lameness on a dairy operation.
With the cost to raise a dairy replacement being more than to purchase one, farmers must be diligent in raising a dairy replacement to enter the milking string at the optimal time and weight to reduce rearing costs and increase productivity. Numerous studies recommend the optimal age at first calving (AFC) is 24 months of age. Any delay past 24 months will add an additional $2.50, or more, a day to the cost of raising replacements as well as require more heifers to meet the herd replacement needs.
The nutrient needs of dairy heifers change with age and size as they approach maturity with feed intake increasing and diet nutrient concentrations decreasing (Table 1). This is due to changes in growth with heifers having a higher rate of protein growth prior to breeding with slower protein growth as they approach mature body weight. […]
