4th Day®

4th Day® milk replacers are high performance and easy-mixing milk replacers designed to provide early growth to young calves. 4th Day milk replacers are instantized products containing all-milk proteins.

About the Product

Research Proven Performance
4th Day is part of Hubbard’s Foundation line of milk replacers which have been fed to more than 3,000 calves across a variety of environmental and management conditions at the Calf Research Facility, a joint partnership research facility between Hubbard Feeds and the University of Minnesota.

Due to these research efforts, 4th Day has been formulated and proven to support early growth during the nursery phase. In addition, when 4th Day is coupled with a high quality texturized calf starter feeding program and good management, this can lead to a doubling of birth weight by 60 days of age.

Easy Mixing
4th Day milk replacers are instantized to ensure easy mixing. Mixing ease is measured by:

  1. Mixability: ease of going into solution
  2. Wettability: time to break water tension
  3. Settle-out: suspendibility of solution

4th Day milk replacers are manufactured to maximize mixability and wettability while minimizing any settle-out.

High Quality Ingredients
4th Day milk replacers are amino acid balanced and utilize all-milk protein ingredients including highly digestible skim milk and whey protein sources. The milk replacer is fully fortified and balanced with optimum mineral and vitamin levels. 4th Day is a 20% protein and 20% fat milk replacer.

Selenium-Yeast Standard
4th Day contains organic selenium yeast as a standard ingredient to support muscle development, normal immune function, resistance to disease and enhance overall calf nutritional status.

MOS and Essential Oil Options
MOS or mannan-oligosaccharides and essential oils containing specific plant extracts are optional ingredients available in 4th Day.  Both supplements contribute to maintaining a favorable intestinal environment leading to optimizing nutrient utilization and growth.

Choice of Medicated Additives
4th Day milk replacers are available with medicated additives at FDA-approved levels. Refer to product tag for specific claims. 

Medicated Options Include:   


1600 g/ton

Neomycin Base (from Neomycin Sulfate)

For aid in the treatment of bacterial enteritis (scours) and bacterial pneumonia

1600 g/ton


For the prevention of coccidiosis in non-ruminating and ruminating calves and cattle caused by Eimeria bovis and Eimeria zuernii.

22.7 mg/lb.


For control of coccidiosis caused by Eimeria bovis and Eimeria zuernii.

90 g/ton

Nutrient Analysis

Crude Protein, min % 20.00
Crude Fat, min % 20.00
Crude Fiber, max % 0.15
Calcium (Ca), min-max % 0.75-1.25
Phosphorus (P), min % 0.70
Vitamin A, min IU/lb. 30,000
Vitamin D3, min IU/lb. 10,000
Vitamin E, min IU/lb. 100
Feeding Directions

Mixing Instructions:  Measure 2.0 quarts of clean, warm water (110° F) into a clean bucket. Fill enclosed cup level full (10 ounces) with milk replacer powder. Sprinkle 10.0 ounces (0.625 pound) of milk replacer onto the water surface and mix thoroughly. Feed this amount TWICE a day.

At Birth:  Feed 1 gallon of high quality, disease free colostrum within 4 hours of birth followed by another 2 quarts of colostrum or milk replacer 12 hours later.

Day 2:  Begin feeding 4th Day milk replacer according to tag directions.

4 to 35 days of age:  Provide a texturized 18% calf starter along with clean, free choice water. Replace daily and keep fresh and clean at all times. Continue to feed 4th Day milk replacer according to tag directions.

35 days of age:  Reduce milk replacer feeding by 50% when calves are consuming at least 2 lbs. of calf starter daily.

42 days of age:  Wean completely when calves consume at least 3 pounds of calf starter for 3 days in a row. Offer free choice 18% calf starter and free choice water for two weeks prior to moving and grouping.

Cold Weather Feeding:  Newborn calves can experience cold stress at temperatures below 50 degrees F. Options for providing more nutrients to calves during cold stress include:

  1. Feed up to 50% more milk replacer solution per calf per feeding (feed 3 quarts versus 2 quarts per feeding).
  2. Add a third 2 quart feeding during the day.
  3. Add Calf-Cal high energy supplement to the existing milk replacer.


Management Tips

  • Offer clean, fresh water at all times.
  • Clean, sanitize and air dry feeding and mixing equipment after each feeding.
  • Avoid feeding hay prior to weaning.
  • House calves in a well ventilated area.
  • Provide clean, dry bedding at all times.

These products, which contain added copper, must not be fed to sheep or related species that have a low tolerance level to copper.  These products have been formulated specifically for dairy calves and are not intended for other species. 

Product Number

#2K02—4th Day® 20:20 Non-Med, 50 lbs.