Group Housing Calves: Nutrition Essentials
Nutrition plays a critical role in the health and growth of group-housed calves. Ensuring every calf receives proper nourishment, even when competing with pen mates, is vital for strong development, disease resistance, and a smooth transition to weaning.
Dr. Laura Meier, Technical Service Veterinarian at Valley Vet Supply, shares expert insight into best practices for feeding, monitoring health, and supporting rumen development in group housing systems.
How Can Producers Ensure All Calves are Receiving Adequate Nutrition When Competing with Pen Mates?
Try to keep calves of the same age together, with no more than a ten-day difference between the youngest and oldest. This helps prevent older calves from bullying younger ones. To reduce competition in the pen, maintain stocking densities at or below the recommended levels. Recommended usable, bedded resting space ranges from 30 to 40 square feet per calf. Provide plenty of space at the grain feeders and water sources so multiple calves can access them simultaneously. Ideally, fresh grain and water should be available free choice.
Providing fresh water separate from milk is essential for proper hydration, encouraging solid food intake, and supporting rumen development. Calves especially enjoy warm water.
Beyond basic hydration, water can also serve as a vehicle for additional support during stressful periods. A recommended practice is to offer one quart of warm water immediately after feeding milk. During periods of stress, adding Bluelite C or another suitable electrolyte to the warm water can help calves cope and support a healthy immune system. In pens with automatic calf feeders, mob feeders such as the Milk Bar 10 with EZ-Lock or Milk Bar 5 with EZ-Lock and Calf Feeder with 5-Teats allow multiple calves to drink simultaneously.
How Can Proper Feeding Practices Support Calf Health?
Feeding a high-quality milk replacer and following the label directions are essential. Pay close attention to mixing and feeding temperatures; some replacers require mixing at higher temperatures to emulsify the fats and then cooling to 100-105° Fahrenheit before feeding. Failing to mix or feed at the correct temperature can disrupt the natural gut microbiome, increasing the risk of scours, bloat, and even sudden death.
Feed calves multiple times a day rather than just once. Calves naturally nurse frequently, and more frequent bottle feedings mimic this behavior. Smaller, regular meals help maintain proper stomach pH, support digestion and ensure adequate water intake.
What's Better for Calves, Milk Replacer or Discard Milk?
Once feeding practices are in place, the next decision is what to feed. Deciding between discard milk and milk replacer often depends on supply and demand. Surplus whole milk or discard milk, milk not suitable for human consumption, can be a suitable option for some operations. Using it may save time and money by reducing the need to buy and mix milk replacer.
However, milk replacers offer consistent fat and protein levels, which support steady calf growth, whereas whole milk composition can vary depending on the cow's diet. Some milk replacers also contain medication to help control coccidiosis in calves. Whole milk can provide similar coccidiosis protection when used with products like Pro-Bac-C Medicated for Dairy Calves, as long as it is mixed and fed according to the label instructions.
Does the Type of Calf Starter Matter?
Focusing on milk when thinking about calf nutrition is easy, but a high-quality calf starter is just as important. Starters vary in texture, moisture, palatability, nutritional content, and smell. A well-formulated starter should be offered in a coarse, non-dusty pellet form to encourage intake and support rumen development, with daily cleaning of troughs to maintain freshness. Variations in starter often come from available forages and whether the feed is mixed on-farm or purchased.
One of the biggest concerns is the presence of fines, small particle sizes. Proper rumen development depends on particle size and substance. Excessive fines lower rumen pH, leading to acidosis and reduced intake. Grains chemically stimulate rumen development more effectively than long-stemmed hay, so a balance is key. Good choices include flaked corn, whole oats, steam-rolled barley, and soyhulls, combined with a pellet and molasses for palatability.
Calves should have access to a starter and free-choice fresh water as early as three days of age. While intake is low initially, having starter present encourages early rumen development, which supports efficient growth and reduces reliance on milk or milk replacer, making weaning smoother. Start with a few handfuls per day and increase as the calf consumes it.
Daily cleaning of troughs is crucial. Poly feeders or clip-on or hook-over buckets are ideal for easy cleaning and disinfection. Water availability directly impacts starter intake, without clean water, calves will eat less.
The goal is for calves to be consuming at least 3 lbs of starter daily by the time weaning begins.
When managed properly, group housing can support excellent calf growth and development. By providing consistent nutrition, monitoring health closely, and encouraging early rumen development, producers can raise healthy, thriving calves ready to transition smoothly into the milking herd.
