Calf Health Champions

Sheena Tyrrel

Spring 2023

Waterford Institute of Technology

The aim of this project was to determine if the addition of milk additives containing probiotics and essential oils, improves the health and performance of pre-weaning dairy calves. This trial also compares the difference in formulation types of these additives. And the influence of good quality colostrum has on calves.

Given “good” quality colostrum. A week-by-week analysis was completed at the end of each week to measure calf health and performance in terms of calf weight (including Average Daily Gain), temperature and a General Health Score (as adapted by School of Veterinary Medicine, (2015)).

The trial consisted of three individual groups, two treatment groups and one control group. Each group was made up of 18 Friesian (FR) or Friesian Cross (FRX) heifer calves.

In this trial over the 13 weeks the author noticed a significant difference on calves receiving Precision Microbes results below. Also, it was noted a quicker recovery from scour was observed.

Treatment Group 1 (TG1) calves were given the liquid probiotic milk additive product Precision Microbes Probiotic and Postbiotic Solution for Calves. Treatment Group 2 (TG2) calves received a powered milk additive formulation. The Control Group (CG) did not receive any additional products.

Apart from the different milk additives, the study groups were subject to the same feeding regimen and housing environment. A seven-week treatment duration was used. The colostrum quality was determined of each calf’s dam, using a brix refractometer. This was to ensure calves were

GroupWeek 1
Starting Weight (kg)
Week 8
End of Milk Additive
Weight (kg)
Week 13
Pre-Weaning
Weight (kg)
Treatment Group 1
(Precision Microbes)
35.465.591.9
Treatment Group 236.867.288.3
Control Group34.962.987.7

Findings Pre-Weaning

Weight difference of 5kg between TG1 and TG2
Weight difference of 3.7kg between TG1 and CG
Weight difference of 1kg between CG and TG2