AMPLI-Calf® GrowerAMPLI-Calf® Grower is a dairy heifer feed specifically formulated to meet the nutritional needs of heifer calves age 12 to 24 weeks. This feed promotes optimal growth, average daily gain and supports rumen development—all critical facets to help a healthy, weaned calf become a dairy cow with more profit potential.

AMPLI-Calf® GrowerAMPLI-Calf® Grower has the potential to help calves avoid the growth slump typically seen immediately following weaning. This slump occurs because calves are taken off diets of milk and starter and transferred to a diet containing high amounts of forage, with little to no grain. At this stage in a calf’s development, her rumen isn’t ready for a high forage diet and growth rates can suffer as a result. Rumen development is a crucial part of the calf skipping the growth slump.

AMPLI-Calf® Grower is a rapidly fermentable feedstuff that has been show to grow rumen papillae to the optimal size. Well-developed rumen papillae allow the calf to absorb nutrients from the diet fed to grow and mature. This allows calves to reach puberty and breeding size sooner than conventionally fed calves whose rumens are undeveloped.


  • Helps calves attain a well-developed, better functioning rumen that will optimize a young heifer’s nutrient utilization from forage-based diets, making her a more productive mature cow.
  • Complete feed for easy and consistent calf nutrition management.
  • Reduced post-weaning growth slumps, due to its delivery of consistent nutrient intake in a palatable and rumen-enhancing form, to help calves achieve optimal growth.

With AMPLI-Calf® Grower, producers are able to proactively avoid the typical growth slump after weaning and provide their heifers with a nutrient supply above maintenance, which sets the foundation to become a better lifetime milk producer.

Feeding AMPLI-Calf® Grower also increases rumen development and papillae growth, optimizing nutrient absorption in the bloodstream to benefit growth now and production in the future. Prior to the introduction of this product, no other calf feed product addressed the need for superior rumen development in the post weaned calf, which has been proven to link to lifetime feed efficiency and productivity.

Based on controlled research studies at Land O’Lakes Purina Feed LongView Research Farm during 2010 and 2011, AMPLI-Calf® Grower demonstrated an increase of 70 pounds more gain (17 percent), 1.2 inches greater growth in height (3 percent) and 4.7 inches greater growth in length (10 percent), a 118 percent beneficial growth in rumen papillae length, a 3 percent feed-to-gain ratio and an average daily gain (ADG) advantage of 29 percent at 24 weeks of age. In this trial, all calves received a full potential milk replacer diet (28 percent protein, 20 percent fat) until eight weeks of age fed along with AMPLI-Calf® 22 Starter from day 3 to 12 weeks of age. At 12 weeks of age, calves were placed on either 4 or 10 pounds of AMPLI-Calf® Grower per day, with free-choice hay.