Worm Counts, Not Guesswork: Managing Parasites in Our Herd

27 May, 2025

By Rebecca Andrews, Windy Station

At the end of April, we carried out a routine faecal egg count (FEC) on our bulls as part of our ongoing animal health monitoring program. This involved collecting random faecal samples from a few bulls in each paddock, with careful records of where each sample came from. These samples were then sent to a Sydney-based lab for analysis.

The results revealed a small number of bulls with elevated larval counts. However, based on animal history and visual assessments of the bulls’ current condition, we determined that there was no immediate need to drench—especially not on a mob-wide basis. Instead, we’ll continue to keep a close eye on condition and reassess with further testing as needed.

In late May, we also conducted FEC testing on our weaner heifers and steers. There were two main reasons for this. Firstly, the weaners had been drenched in March at weaning—so this follow-up test helped us assess how effective that treatment was and whether there are any signs of drench resistance. Secondly, these young cattle were involved in a local cutting event, a higher-stress activity that can impact immunity. Knowing their worm status helps us make proactive decisions to support their health.

Worm tests are conducted using lab-provided kits. We collect fresh manure samples from the ground immediately after observation to ensure accuracy, as older samples can lead to unreliable egg counts. Once collected, samples are sealed and sent to the lab along with supporting details such as breed, age, sex, condition, time in paddock, pasture type, rainfall, and last drench date. Lab results are typically returned within a few days.

This targeted approach to worm control allows us to avoid unnecessary drenching. Drenching, while important, can be costly and time-consuming—and overuse can lead to resistance. That’s why we focus on using it only when needed, based on clear evidence.

At Windy Station, we’re committed to sustainable livestock management. Routine monitoring and informed decision-making mean we can maintain animal health while preserving the long-term effectiveness of vital treatments.