Non-cycling is the most common cause of infertility in New Zealand herds.
Non-cycling cows fit into two categories:
These cows reduce submission rates; in turn impacting the 6-week in-calf rate, the number of AB calves, and days in milk for the following season.
A number of factors can contribute to a cow becoming a non-cycler
Pre-mating heat detection (through the use of tail paint or heat mount detectors) is crucial to identify non-cyclers early on. Starting 5 weeks out from planned start of mating (PSM) gives you adequate time to identify whether you have a problem. To reach the target 3-week submission rate of 90%, more than 85% of the herd should have cycled by 10 days before PSM.
The only effective option this close to mating is hormonal intervention. Your vet will be able to tailor a plan that is cost-effective and works for your specific situation, but in general, non-cycler treatments are more profitable the earlier you treat. This is because it:
Now is the time to act, if you think (or know) you have a problem, do not hesitate in getting in touch!
Dr Steph Reid, Farm Vet, Kopu.