Heat Stress in Dairy Cattle and Why Summer Losses Need Fast Fallen Stock Collection

Martlands

Heat stress in dairy cattle is one of the most underestimated seasonal risks on North West farms, and it can turn a routine summer week into a sudden welfare and compliance problem. High-yielding cows generate enormous metabolic heat, and once humidity climbs across the Lancashire plain and the Cheshire dairy belt, even a few days in the low twenties can push a herd past the point where it can cool itself. When losses follow, every fallen animal becomes a regulated waste stream, and that is where a licensed, DEFRA-approved operator providing fallen stock and ABP collection becomes part of your summer plan rather than an afterthought. Martlands is a family-run business based in Burscough, and we collect fallen cattle across the region’s dairy heartlands every summer.

How Summer Heat Turns Into Sudden Dairy Losses

Dairy cows are comfortable in cool, damp conditions, which is exactly why the North West has always been good dairy country. The flip side is that the modern Holstein is poorly adapted to heat. As the temperature humidity index rises, cows eat less, drink more, stand for longer to lose heat, and divert energy away from milk and rumen function. Fertility drops, lameness worsens because cows crowd around water and shade, and the oldest and highest-yielding animals in the herd are the most vulnerable. A cow that is already fighting mastitis, a difficult calving, or displaced abomasum has very little reserve left when a heatwave arrives, and these are the animals most likely to be found down.

The pattern matters because it is rarely a single dramatic event. Summer dairy losses tend to cluster over a hot spell, with one or two animals lost on consecutive days. That clustering is precisely what catches farms out, because a single carcass is manageable but three or four in a week, in temperatures that accelerate decomposition, quickly becomes a storage and odour problem on a busy yard.

Recognising the Warning Signs Early

Practical heat-stress management starts long before any animal is lost. Watch for rapid open-mouthed breathing, drooling, crowding into shade, a sharp drop in the bulk tank, and cows that stop lying down. Providing extra water troughs, shade over collecting yards, fans in the parlour holding area, and adjusting feeding to cooler parts of the day all reduce mortality. None of this removes the duty that applies the moment an animal does die, but it reduces how often you have to invoke it.

The Twenty-Four Hour Duty of Care

Under the Animal By-Products (Enforcement) (England) Regulations 2013, a keeper has a duty of care to ensure fallen stock is collected without undue delay, and the working standard the industry applies is collection within twenty-four hours of discovery. On-farm burial and burning have been illegal in the United Kingdom since 2003, with only very limited exceptions for genuinely remote areas, so digging a hole in the corner of a field is not a lawful option for a Cheshire or Lancashire dairy unit. If you keep cattle, you can read more in our overview of the ban on burying or burning fallen stock, which sets out why the law changed and what it means in practice.

Fallen cattle also carry a specific testing obligation. Any bovine animal over forty-eight months of age that dies on farm must be sampled for BSE, and Martlands operates as a DEFRA approved sampling centre, so that step is handled as part of the collection rather than becoming a separate headache for you. Our explanation of BSE testing of fallen cattle walks through how the sampling works and why it matters for older dairy cows in particular.

Why Speed Matters More in July Than in January

The same dead cow behaves very differently in a heatwave than on a frosty morning. Warmth accelerates bacterial activity, bloating and fluid loss within hours, which intensifies odour, attracts flies and vermin, and raises the risk of leakage on hardstanding that drains towards watercourses. A carcass that would have sat safely overnight in winter becomes a biosecurity and nuisance issue by the afternoon in summer. This is why we prioritise same-day collection availability for fallen stock and run a rapid-response fleet from our Burscough base out along the M6, M61 and M58 corridors into the dairy farms of the Fylde, the Ribble Valley and mid-Cheshire. Farms that have dealt with a bad summer before tend to read our guidance on why prompt fallen stock collection is critical during hot weather and build it into their heat plan.

Documentation That Protects Your Assurance Status

Every collection we make is accompanied by a Commercial Document, the regulated paperwork that records the movement of the carcass from your farm to an approved facility. For dairy farms in particular, that document is not just a legal formality. It is the evidence your Red Tractor assessor and your local authority will look for, and it underpins your herd health records. Retaining these documents is part of staying inspection-ready, and our wider service for Lancashire fallen stock collection is built around giving dairy clients clean, auditable records every single time.

Building Heat Into Your Summer Routine

The farms that cope best with summer are the ones that treat fallen stock collection as a standing arrangement rather than an emergency call. Knowing in advance who you ring, having a clean, accessible collection point away from the parlour and stored feed, and understanding the BSE sampling requirement for your older cows all take the panic out of a hot week. When you do need us, one call gets a collection moving.

If you farm dairy cattle anywhere across Lancashire, Cheshire, Merseyside, Cumbria or Greater Manchester and you want a reliable collection partner for the summer ahead, call Martlands on 01704 776977 and we will get your fallen stock dealt with quickly and compliantly.

author avatar
Martlands