Maintaining your horse at a healthy weight can be difficult, especially with some native breeds who seem to look at grass and gain weight! One of the most common health issues seen routinely by vets in the UK is horses being overweight. Most horse owners understand the dangers of a horse becoming too thin, but being overweight is just as unhealthy and can be much more difficult to manage. Although many owners know that their horse shouldn’t carry excess weight, often the challenge is in recognising what a healthy condition looks like as, unfortunately, it has become normal to see horses carrying more weight than they should.
Being both underweight and overweight comes with their own set of potential causes and further problems, which can compromise your horse’s health and quality of life.
| Underweight | Overweight | |
| Examples of common causes | Lack of appropriate diet Worm burden Dental issue Cushing’s/PPID | Excess calorie intake/lack of appropriate diet Lack of exercise Equine metabolic syndrome |
| Examples of potential associated problems | Anaemia Gastric ulcers Lethargy Less able to perform during exercise | Laminitis Extra strain on the heart and lungs Added pressure on limbs and joints Less able to perform during exercise |
As overweight horses are more commonly seen, the rest of the page will focus on managing overweight horses.
How to determine if a horse is overweight
The first thing to understand is the assessment criteria you can compare your horse to. Knowing your horse’s weight is useful for a number of reasons but it won’t tell you if this is appropriate for them.
There are two main fat scoring systems, the 0-5 system (Carroll and Huntingdon) or the 1-9 system (Henneke). Both provide an effective way of assessing condition and use hands-on techniques to feel for fat cover rather than just looking at a horse. If you have limited experience of fat scoring, the 0-5 system can be easier to apply.
A weigh tape is a good tool for monitoring weight and identifying changes but must be used in conjunction with fat scoring to assess condition. The most accurate weigh tapes have both a horse and pony side so you can choose the correct one according to your horse’s height. If you have access to a weighbridge this gives an accurate measurement so is a good tool for monitoring changes in weight.
Top tips for managing your horse’s weight
It is impossible to tell by eye how much fat a horse is carrying, and this can be surprisingly deceptive. Feel for fat in specific areas to check your horse’s condition using the guides and as described in the videos below.
Ask an expert whether you are feeding your horse appropriately. This can be very confusing, which makes it easy to feed your horse more calories than they really need. Also, try to make titbits and treats the exception rather than the rule. You may also need to soak hay to reduce sugar content.
Horses must have a steady supply of food to keep them healthy, so you need to find ways to reduce the calories without cutting down the quantity.
Most leisure horses get more calories than they need from grass alone. In many cases it may be necessary to restrict their grass intake in some way, although additional vitamins and minerals will still be required. Watch our videos to find ways to cut down the amount of grass they get without stopping them from eating completely. If you have the opportunity, you may want to strip graze or implement a track system to increase movement and reduce grass intake.
A high energy feed is also high in calories. Feeding an overweight horse more calories won’t give it more energy for work, but it will create more fat. Think about reducing their calorie intake so they lose weight and build up fitness to give them more energy.
A brisk walk or steady trot will burn more fat than faster work such as canter. Find ways to build more walking into your horse’s day, maybe put some poles out to go over on your way to and from field. Horse walkers can be a useful tool for weight loss but shouldn’t be overused or relied upon. Walking up hills, in hand or ridden, is also an excellent way to burn more fat.
Remember that horses already have waterproof coats and their own central heating systems – digesting fibre generates heat, and this helps to keep the horse warm from the inside out. If your horse is overweight, consider whether it could go without a rug or if a lighter weight one would be more suitable.
Don’t be tempted to feed or rug your horse the same way as other horse owners on your yard – treat each horse as an individual. Consider what your horse needs and remember that it might be different to what other horses need, even if they’re of a similar type.
Horses can put on weight very quickly so fat scoring and weigh taping your horse fortnightly will help you spot any changes more quickly than you could by eye.
You can also watch the videos and download our Right Weight leaflet.
“Keeping your horse at a healthy weight throughout the year (part 1)” – with internationally renowned clinical equine nutritionist Dr Teresa Hollands and our own Head of UK Support Sam Chubbock.
“Keeping your horse at a healthy weight throughout the year (part 2) – nutrition” – with internationally renowned clinical equine nutritionist Dr Teresa Hollands and our own Assistant Centre Manager at Glenda Spooner Rescue and Rehoming Centre Sara Jerman.
How to know if your horse is the Right Weight
Our guide provides further information on:
- Problems associated with horses being overweight
- Updated resources on how to fat score
- Weight loss tips
- A weight chart to track your horses weight loss journey
How to fat score
- Download our posters on how to fat score
- Perfect for your tack room
- Contact education@worldhorsewelfare.org to request a posted copy for your yard.
World Horse Welfare Fat Scoring Podcast
Equine obesity
Our guide provides further information including:
- Discussion on why obesity is a disease of domestication
- Energy balance and links to obesity
- Further tips and guidance on reducing your horse’s weight
NOTE: This guide shows images of dissection.
