Hear about early insights in DairyNZ’s heat stress trial at Scott Farm from experts Dr Charlotte Reed and Jac McGowan, plus current info and solutions for keepings cows comfortable and productive in hot conditions.

Heat stress in cows happens when they can't dissipate the heat they generate, leading to discomfort and lower milk yields. Unlike humans, cows can start feeling the stress at temperatures below 20°C.

Heat stress can negatively affect dairy cows in many ways. DairyNZ is researching methods of identifying when heat stress might occur to help farmers manage their herds and lessen its impact.

How does heat stress affect cows, what are some warning signs, and what can you do on farm to make life more comfortable for your cows?

Scientist

Review your heat detection strategy each season, ensuring it includes careful planning, effective use of aids, keen observation, accurate record-keeping, and regular staff training.

Automated heat detection uses technology to identify cycling cows. Before investing, discover key considerations, such as understanding the reasons for using technology, how well it performs, the fit with your farming style, and your training needs.

You care for your cows, but what happens once they leave the farm? In this episode, Dr. Stacey Hendriks and Penny Timmer-Arends share three key steps to help cull cows travel well. Tune in for tips to ensure a smoother journey beyond the farm gate.

Using heat detection aids efficiently will help ensure a successful mating period on your dairy farm. There are different heat detection aids for cows, including tail paint, heat mount detectors, electronic heat detection, and vasectomised bulls.

Taranaki dairy farmer Kane Brisco nearly walked away from farming, worn down by the constant physical and mental strains of the job.

Wearable technologies (such as cow collars) are becoming a popular tool for assisting with reproductive management. In 2025, around 1 in 5 dairy farms are using wearables , mostly to help with heat detection, a factor in getting cows in calf.

Planning and preparing for calving with your farm team will reduce stress when calving is in full swing and will help keep everyone safe and healthy. Spend time with your team prior to calving to create a plan that works for everyone.