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RRP $70 per 2L bottle (USD)

Minimum Order: 18

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CalfBrew™  is  designed to bring calves through their first year in their best condition at a truly affordable price ($8.75 per-calf for a 5ml per-calf per-day dose for 50 days from birth to weaning).

CalfBrew™  may be used from birth, through weaning, and all the way to being fully developed grazers.  It  is administered in milk or milk-replacement prior to weaning and in stock water post-weaning.



What's Unique About CalfBrew?

CalfBrew’s probiotics are alive.  

Designed and manufactured by  BioBrew  Ltd,  and developed through  NZ Government-funded research at Lincoln University,  CalfBrew was formulated with  NZ’s  Ministry of Primary Industries’  GRAS-Registered microbes including  BioBrew’s  proprietary Lactobacillus reuteri  MFC- 2, selected to give  customers’  valuable calves the advantage they need to become top producers in  the  herd.  

We think there really is nothing else on the market like it, not just in New Zealand but globally.  


Why Fresh Is Best

You wouldn’t enjoy being freeze-dried and neither do microbes.

Freeze-drying damages most of the microbes being processed, with only 1/10th or even 1/100th of the microbes you start with surviving in a condition from which they may be brought back to life.

Re-animating a freeze-dried culture takes another heavy toll, with only 1/10th to 1/100th of the microbes that may have been able to survive actually finishing the process in a condition where they can metabolize and reproduce.

This means that only a tiny fraction – 1/100th to 1/10,000th of the microbes that enter the freeze-drying process – will ever wake up and get to work trying to be a probiotic.

This process also takes time, meaning the tiny fraction of microbes that do make it only benefit the lower part of the gut they find themselves in once they get to work.

Ingredients, Dosage & Instructions

Water, Molasses, Sugar, Lime, Kelp, GRAS Microbial Culture (over 109 Lactobacilli/dose) incl. M.P.I. GRAS Registered Lactobacillus reuteri, Yeasts. Please note: all sugars have been consumed by the probiotic microbes prior to bottling. There are no residual sugars present in any of our products at the time of bottling. Ingredients may be subject to change without notice.

Maintenance dosages
Calves: 5-10ml/day (per calf) in milk or milk replacement. After weaning, can be added to stock water. Can be used as a direct drench. Lambs & Kids 3-5ml day mix with feed, water or direct drench. We recommend a higher dose for the first week of administration and a lower maintenance dose for everyday use.


CalfBrew may be administered via stock water, feed, or direct drenching. For calves, CalfBrew may be added to milk or milk replacer. Keep bottle tightly capped, out of direct sunlight. Do not refrigerate. Use within 30 days of opening. No special handling requirements. Eye contact: flush with water.