18/04/2025
🌱🌱⚠️⚠️SPRING GRASS WARNING⚠️⚠️🌱🌱
The impending flush of Spring grass can cause many issues to your horse. Not only colic and laminitis but lots of other issues that will affect their wellbeing and performance. It can even cause lameness, headshaking, bucking plus many more problems!!!
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We've been really spoiled with a dry Spring this year in England. Last year was a complete washout. It has been lovely for everyone to enjoy time outside to blow the cobwebs off from Winter.
However, looking at the countryside as I travel up and down the country, you can see that all vegetation is poised and waiting for that first proper drop of rain to come to start a big Spring bloom or flush.
THE FLUSH OF GRASS:
Fresh quick growth of grass through a combination of rain and sunshine will come with an increased sugar content as well as other factors such as increased water content and other substances within the grass that can upset the horse's digestive system.
Horse's are more designed for poorer fibrous forage not this high sugar grass we have in the most of the country. It would be just like us, eating lots and lots of sweets...our digestive system would not be happy. In horses, they get a lot more issues than that too!
PROBLEMS
We already know that this flush of grass can incite laminitis as well as colic. However, there are so many more issues that this flush can cause.........
▪️Upset hind gut
▪️Bloating
▪️Faecal Water Syndrome
▪️Kidney and Liver issues
▪️Hindlimb and forelimb lameness (often right hind and left fore)
▪️Tension in the lumbar region causing bucking
▪️Headshaking
▪️Wither tension
▪️Girthing issues
▪️Sensitivity to being brushed
▪️Swelling of udder and sheath
▪️Filling of hind legs
▪️Reluctance to canter (often on left rein)
▪️Disunited in canter
▪️Breathing issues
▪️Becoming anxious, sharp, even aggressive
▪️Strong seasons in mares
WHAT LINKS ALL THIS TOGETHER?
All of these issues occur predominantly due to the grass upsetting the internal organs. Yes, some of the lameness issues and performance problems can indeed be created by the internal organs!!
THE ORGANS
Most of the organs sit within the abdominal cavity (ie stomach, liver, kidneys, spleen, small intestine and part of the hindgut). They get some of their nerves from the thoraco-lumbar spine (under the saddle and after it into the lumbar region). In fact, some organs share nerve regions which adds another layer of issues in that organs can annoy each other...(see the mares later)
When the organs are upset by the grass changes (particularly the digestive and detox organs such as stomach, liver, kidneys, small intestine and hindgut) they cause the area of the spine that they get their nerves from to be upset too. In particular, the lower back.
Depending on the location of the organ you will get certain areas of the body tighter than others...stomach often links to left fore, liver can restrict mainly right fore, left kidney will restrict left hind and hind gut, the right hind.
THE HIND GUT
Since the hind gut has the largest volume it can often cause a lot of severe issues. Obviously colic, but also due to it's position on the right flank (caecum) it can really upset the right hind limb motion as well as cause the lower back to bend to the right.
PERFORMANCE PROBLEMS DUE TO THE HINDGUT
The tension in the right hind often involves the hip but can also cause SI and hock tension as well as some stifle issues. These can be mis-interpreted as genuine limb lameness's when really it is the guts causing issues.
Due to the diagonal biomechanical relationship, when the hind gut is upset it can also cause intermittent lameness in the left fore. Again this can often be misinterpreted as a genuine limb lameness and lots of time can be spent nerve blocking and imaging the limb when in fact it is coming from the other end of the body and actually from the insides!
Also, the left fore can be put under further pressure by the involvement of the stomach too.
HEADSHAKING
From an osteopathic perspective, the right hind (particularly the pelvis, hip and SI) is strongly related to the right side of the head (poll and TMJ's). The tension that the right hind can get from the upset hind guts can cause huge poll and TMJ tension, which can upset the nerves in the head and create headshaking issues.
WHAT CAN BE DONE???
GRASS MANAGEMENT
Well the first thing to do if you have any of the obvious signs of grass-related issues is to reduce the time at grass! This can be difficult if you do not own your own land and have stabling facilities but it is really important to limit the grass intake during the flush of grass.
Grass itself is a very complex plant and there are a lot of arguments about how long the grass should be, when is the best time to graze and types of grasses to grow etc. Unfortunately, it can be a very individual thing with each horse. There are many physical factors that have to be considered when deciding on how the grass needs to be managed.
DIGESTIVE SUPPLEMENTATION
There are plenty of digestive supplements that can help assist the hind gut and other digestive/detox organs through this period. HOWEVER, please remember that supplements are supplementary to good grass/dietary management and also being aware that there are quite often other factors in play that are making that particular horse more sensitive to the grass....... So, supplements are useful but only in addition to correct management through a thorough understanding of your horse's issues.
THE OTHER FACTORS
This is the part that everyone severely overlooks. It seems to be in our nature that we would rather reach for a bag of supplements than try to understand why our horse is like it is. I think wholeheartedly that supplements are useful but I strongly advise you to understand the other factors as it will have a greater affect on your horse's long term wellbeing and performance.
These other factors relate to what state the rest of the body is in. For example, if there is already tension in the thoraco-lumbar region, your horse could well be on the "IBS spectrum" and therefore the internal organs are far more sensitive to any dietary changes, including the grass. If you don't get on top of the overall tension problem, there will be no amount of supplement that will help you!!!
These things include kissing spine, arthritic changes to the lumbars. It also includes head and neck issues are they can create excessive body tension and slide the horse onto the "IBS spectrum".
The lower back tension can also be affected by posture, foot balance, dental balance, saddle fit to name a few. These can all increase the lower back tension and make the organs more sensitive to other changes.
Mares with ovarian issues can cause the digestive system to be more sensitive too. This is as a result of the ovaries sharing a similar nerve area in the back as the digestive system. It is why a mare that comes into a strong season can colic....
Finally, there are the multitude of metabolic issues that can cause greater sensitivity to changes in the grass.
SUMMARY
1) please be vigilant with the grass over the next month or so!
2) get ready to bring your horse off the grass at least some of the day to reduce grass intake. Bring them in onto good bland forage such as hay.
3) use an appropriate supplement to help the guts
4) please, please, please make sure that you get your WHOLE horse checked over properly if you have any of those symptoms listed at the top of the article. There is a good chance there are deeper issues at play that need to be addressed.
Take care and enjoy the Spring....but please be careful!!!