• Briony Witherow BSc MSc RNutr. PGCERT FHEA

Laminitis!

Briony Witherow, gives us practical nutritional advice for its prevention and management


Whether you’re managing a horse or pony that has previously had laminitis or, one that may be at high risk due to metabolic issues, obesity or other factors, the nutritional approach is the same. Management for low starch and sugar rations should be approached firstly by addressing the forage (hay/haylage/pasture), then by adding concentrate feed as required. For both aspects, feed, and general management (including owner compliance) should be considered.


Learn how to recognise obesity in the horse


Forage

This should form the basis of the ration and is arguably the most challenging. As forage (pasture, hay, haylage) forms the foundation of the ration (a minimum of 1.5% bodyweight dry matter), it is likely to be the greatest source of calories (energy) and sugar in most horse’s diets. Forage is hard to regulate and is often furthermore limited by the owner’s facilities or flexibility to buy and manage their own supply. For this reason, while the following outlines an ‘ideal’ for those at risk of laminitis, the practicalities of horse ownership mean that ticking all ‘the boxes’ is often unrealistic.


Conserved forage

While the ideal forage is not always possible to source, it is good to have an idea of an appropriate nutrient specification as an end goal. The more appropriate forage you can source, the easier the management and the less reliant we are on concentrate feeds – that goes for all horses, not just laminitics. Selecting the right hay or haylage may also allow for greater volumes to be fed, helping to avoid ‘hangry horses’ while also having the potential to facilitate weight loss¹ ².


The ideal specification of hay or haylage should be low (<10-12% DM) in non-structural carbohydrates (NSC (starch and sugar)); high in fibre (NDF 60-65%; ADF 35-45%) and, where weight loss or control is required, low in calories (energy) (≤8MJ/kg digestible energy). While hay or haylage arguably may meet these requirements, hay can provide greater flexibility with the option of soaking and, tending to be less palatable, may occupy the horse for longer³ ⁴. Alternatively, where haylage is analysed, it can be combined with straw to provide an appropriate ration with regards to calorie and sugar content.


Dealing with less-than-ideal forage?

If you are unable to source your own forage or, like many of us, in yard situation where it is simply not possible to have multiple different hays and haylages for induvial horses, this is still workable.


If you have a good consistent supply of forage, the first step is knowing your starting point. Taking a small sample of around 10% of the bales and sending off for a basic analysis will give us an idea of suitability. As a guide, a basic Near Infrared Reflectance Spectroscopy (NIRS) analysis starts at around £20 and, will give you an idea of calorie and fibre (ADF and NDF) content and an estimate of sugars. For a more accurate analysis (suitable if you have significant stock from the same batch) wet chemistry, starting at £60 this will give you a full analysis, including an accurate breakdown of starch and sugars.


If the forage supply is inconsistent or you receive analysis that indicates the forage to be unsuitable, there are still options available.


Soaking hay is one option. Recommendations on soaking time varies and is ultimately influenced by the starting point (i.e., original nutrient specification) and soaking environment. Soaking hay in clean, fresh water from 1 to 12 hours⁴ ⁵ ⁶, has been shown to reduce sugar content, however caution should be taken with lower soak times where no analysis is present and soak times should be adjusted to reflect weight and condition. In addition to total soak time, other elements of this practice can be adapted to maximise sugar loss. For example, warmer water temperatures, agitation of hay while soaking and increased water volumes¹ ⁵. To account for dry matter losses during soaking, pre-soaked hay rations should be increased by 20% to ensure appetite is met¹.


Another option which can be employed alongside soaking, or in combination with an appropriate (ideally analysed) forage is combining the ration with straw. Replacing up to 30% of the forage ration with good clean straw can help to reduce overall calorie (energy) intake while helping to satisfy appetite ¹ ⁷ ⁸.


Pasture

Pasture management will ultimately depend upon the individual horse or pony. For acute cases of laminitis complete removal of pasture is often necessary in the short-term. Where obesity is also a factor, research indicates, programmes that exclude pasture appear to facilitate greater weight loss⁹. For horses with a history of laminitis, metabolic or other factors that increase laminits risk, it is important to consider that even if body condition and weight is well managed, pasture management to limit sugar intake is essential ¹⁰ ¹¹ ¹².


No single recommendation can be provided when it comes to pasture restriction. Available options are typically kerbed by facilities and other practicalities¹³ ¹⁴. Furthermore, as all horses (and owners!) are individuals, trial and error is, often required to find a solution that works for both. Options include strip grazing; grazing muzzles, stabling, dry lots (grass free turnout) and track systems based around innovative resource placement¹⁴ ¹⁵.


In addition to this, certain environmental conditions can reduce sugar accumulation in pasture. Being aware of these helps to increase awareness of when sugar levels may be high and to approach day-to-day turnout tactically with environmental conditions in mind. Conditions which may results in reduced sugar accumulation include:

  • Overcast days and pasture shaded by trees or hedges. Under these conditions light intensity is lower, which reduces the plant’s ability to produce sugar¹⁶ ¹⁷.

  • Early morning or late evening turnout can be more appropriate. Sugar concentration typically builds during the day and starts to drop a few hours after sunset and rise again by 10am the following day¹⁶.

  • Healthy, stress-free grass accumulates less sugar. Avoiding situations which may cause stress (through inhibiting growth but not photosynthesis), such as drought, poor soil fertility and sunny conditions on frosted pasture is key¹⁶ ¹⁷ ¹⁸ ¹⁹. Furthermore, conditions in the spring/autumn where overnight temperatures dip below 5°C followed by warmer days, also predisposes to NSC accumulation¹⁷.





Common challenges

Regardless of the restriction method, compensatory grazing (where the horse effectively adapts to consume the same grass intake over a shorter period) should be considered. For pasture restriction to work, any method to limit intake should not be employed alongside free access to grass.


A failure to meet minimum fibre requirement can be common under pasture restriction where grass is grazed short. Under this management, horses are routinely grazing new growth, which is typically less fibrous ²⁰ ²¹. Pairing this management with a conserved forage that is high in fibre or increasing the fibre content of the forage ration by adding straw can help to meet fibre requirement and resolve this issue.


Concentrate feed and supplements

The provision of concentrate (bucket feed) will largely depend upon the forage supplied. For many ‘good-doer’ types, suitable low calorie, starch and sugar (<10-12% NSC) options include a balancer, broad-spectrum vitamin and mineral supplement or fortified low-calorie chaff. Which one of these options is chosen, should be informed by the individual horse and management.



 


Fully balanced diet without the calories

The laminitis-prone may need to watch their waistlines but they still need a fully balanced diet for healthy hooves and general well-being. Baileys Lo-Cal balancer is the ideal way to provide essential nutrients, without unwanted calories, and is simple to feed, by the mug-full alongside forage, to ensure the horse of pony is getting all they need.


Its quality protein provides the building blocks for muscle, skin and hoof, and helps maintain top line (not fat) and tissue integrity, while a full spectrum of vitamins and minerals, including antioxidants, is also included. With Digest Plus prebiotic and a probiotic yeast, to support gut health, Lo-Cal is the ideal cost effective solution to help keep the laminitic on a healthy, balanced calorie-controlled diet.


SRP £30 for 20kg


www.baileyshorsefeeds.co.uk

info@baileyshorsefeeds.co.uk

01371 850247


Baileys supporting horses in need

Look out for promotional bags of Lo-Cal Balancer and help raise money for World Horse Welfare.


Since December 2020, Baileys have supported World Horse Welfare with feed and nutritional support for the equines in their care, at their four rescue and rehoming centres throughout the UK. To boost this support, this summer, Baileys will be making an extra donation for every single promotional bag of Lo-Cal Balancer sold, while stocks last.


Feeding is a key part of the recovery process for all horses who arrive at the charity’s rescue and rehoming centres, whether it’s helping malnourished horses to regain weight and condition or supporting those who may be overweight to slim down healthily. Lo-Cal Balancer is perfect for providing essential nutrients, without unwanted calories, for those on a forage-only or calorie-controlled diet.


For more information about how you can help support World Horse Welfare in their work, visit their web site www.worldhorsewelfare.org


References

1. Rendle D, McGregor Argo C, Bowen M, Carslake H, German A, Harris PA, Knowles E, Menzies-Gow N, Morgan R. 2018. Equine obesity: current perspectives. UK-Vet Equine [Internet]. [cited 2 Jun 2022]; 2(5). Available from: https://doi.org/10.12968/ukve.2018.2.S2.3

2. Geor R. 2010. Nutrition and exercise in the management of horses and ponies at high risk for laminitis. J Equine Vet Sci. 30(9):463-470

3. Müller CE, Uden P. 2007. Preference of horses for grass conserved as hay, haylage or silage. Anim Feed Sci Technol. 132(1-2): 66-78

4. Martinson KL, Hathaway M, Jung H, Sheaffer C. 2012. The effect of soaking on protein and mineral loss in orchardgrass and alfalfa hay. J Equine Vet Sci. 31(12):776-782

5. Longland AC, Barfoot C, Harris PA. 2014. Effect of period, water temperature and agitation on loss of water-soluble carbohydrates and protein from grass hay: implications for equine feeding management. Vet Rec.174(3):68

6. Müller CE, Nostell K, Brojer J. 2016. Methods for reduction of water-soluble carbohydrate content in grass forages for horses. Livest Sci. 186:46-52

7. Harris PA, Ellis AD, Fradinho MJ, Jansson A, Julliand V, Luthersson N, Santos AS, Vervuert I. 2017. Review: Feeding conserved forage to horses: recent advances and recommendations. Animal. 11(6): 958-967

8. Dosi MCM, Kirton R, Hallsworth S, Keen JA, Morgan RA. 2020. Inducing weight loss in native ponies: is straw a viable alternative to hay? Vet Rec. [Internet]. [cited 2 Jun 2022]; 187(8). Available from: https://doi.org/10.1136/vr.105793

9. Gill JC, Pratt-Phillips SE, Mansmann R, Siciliano PD. 2016. Weight loss management in client-owned horses. J Equine Vet Sci. 39:80-89

10. Karikoski NP, Horn I, McGowan TW. 2011. The prevalence of endocrinopathic laminitis among horses presented for laminitis at a first opinion/referral equine hospital. Domest Anim Endocrinol. 41: 111-117

11. De Laat MA, Reiche DB, Sillence MN, McGree JM. 2019. Incidence and risk factors for recurrence of endocrinopathic laminitis in horses. J Vet Int Med. 33(3): 1473-1482

12. Durham AE, Frank N, McGowan CM, Menzies-Gow NJ, Roelfsema E, Vervuert I, Feige K, Fey K. 2019. ECEIM consensus statement on equine metabolic syndrome. J Vet Intern Med. 33:335–349

13. Furtado T, King M, Pinchbeck G. 2021. The use of alternative grazing systems in the UK. [Internet]. Report developed in collaboration with Equine Obesity Working Group. UK; [cited 2 Jun 2022]. Available at: https://www.liverpool.ac.uk/media/livacuk/equine/documents/The,use,of,alternative,grazing,systems,in,the,UK.pdf

14. Furtado T, Perkins E, Pinchbeck G, McGowan C, Watkins F, Christley R. 2021. Exploring horse owners' understanding of obese body condition and weight management in UK leisure horses. Equine Vet J. [Internet]. [cited 2 Jun 2022];53. Available from: https://doi.org/10.1111/evj.13360

15. Cameron A, Harris P, Longland A, Horseman S, Hockenhull J. 2021. UK horse carers’ experiences of restricting grazing when aiming to prevent health issues in their horses. J Equine Vet Sci. [Internet]. [cited 2 Jun 2022]; 104. Available from: https://doi.org/10.1016/j.jevs.2021.103685

16. Longland AC, Byrd BM. 2006. Pasture nonstructural carbohydrates and equine laminitis. J Nutr. 136(7):2099S-2102S

17. Watts K. 2010. Pasture management to minimise the risk of equine laminitis. Vet Clin North Am Equine Pract. 26(2): 361-369

18. Chatterton NJ, Harrison PA, Bennett JH, Asay KH. 1989. Carbohydrate partitioning in 185 accessions of Gramineae grown under warm and cool temperatures. J Plant Physiol. 134(2): 169-179

19. Watts K. 2004. Forage and pasture management for laminitic horses. Clin Tech Equine Pract. 3(1): 88-95

20. Equi-analytical laboratories. 2022. Common feed Profiles. [Internet]. Equi-analytical laboratories. New York; [cited 2 Jun 2022]. Available from https://equi-analytical.com/common-feed-profiles/interactive-common-feed-profile/

21. NRC. 2007. Nutrient requirements of Horses, Sixth edition. Washington (DC): National Academies Press

22. Moore-Colyer M. 1996. Effects of soaking hay fodder for horses on dust and mineral content. J Anim Sci. 63(2):337-342

23. Ellis AD, Redgate S, Zinchenko S, Owen H, Barfoot C, Harris P. 2015. The effect of presenting forage in multi-layered haynets and at multiple sites on nighttime budgets of stabled horses. Appl Anim Behav Sci. 171:108-116

24. Rochais C, Henry S, Hausberger M. 2018. “Hay-Bags” and “Slow feeders”: testing their impact on horse behaviour and welfare. App Anim Behav Sci. 198: 52-59



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