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Sheuneni Kurasha
Farmer’s Diary
Last week, farming social media groups were inundated with a heart-wrenching video showing a goat stud breeder in Namibia who lost 40 prized Boer goats due to bloat.
I felt pity for the farmer as he recounted the tragic loss, which involved over US$10 000 worth of breeding stock.
The heart-warming part, however, was that the farmer took it gracefully and emphasised that this was a learning point for him, and he would avoid the mistake of a sudden change of diet for his animals in the future.
In view of the interest in the issue of bloat generated after the video went viral, this week’s instalment focuses on the causes, symptoms, preventive measures, and treatment options for bloat in sheep and goats.
Understanding bloat
Bloat is a serious and potentially fatal condition that affects ruminants, including sheep and goats. It occurs when gas builds up in the rumen (the largest stomach compartment), causing abdominal enlargement and discomfort. This can result from accumulating gases produced during feed fermentation in the rumen.
There are two primary types of bloats, namely, frothy bloat and free gas bloat. Frothy bloat is caused by the formation of a stable foam in the rumen, which traps gas and prevents it from being released.
It is often associated with the consumption of certain types of lush, rapidly growing pastures or legumes, such as lucerne or alfalfa. Frothy bloat is more prevalent during the rainy season when green plants are abundant.
Free gas bloat, on the other hand, occurs when there is an obstruction in the oesophagus or an issue with the normal release of gases from the rumen. It can also be triggered by sudden dietary changes or the ingestion of coarse feed.
Free gas bloat can happen under various conditions, including poor feeding practices or the ingestion of foreign objects.
Causes and risk factors
Several factors can trigger bloat in sheep and goats. These include dietary changes, feed quality, environmental factors, and water intake.
Sudden dietary changes can significantly increase the risk of bloat in goats and sheep, as these animals have sensitive digestive systems that can react negatively to abrupt shifts in their feed.
When ruminants are abruptly introduced to new or rich feed, such as lush pasture or high-grain diets, their digestive system may struggle to adjust, triggering an overproduction of gas in the rumen and causing it to become enlarged and resulting in bloat.
High starch content in new feeds can also disrupt the normal microbial balance in the rumen, aggravating gas build-up and preventing its proper expulsion.
Farmers must transition dietary changes gradually and monitor the animals closely for any signs of digestive distress.
Feed quality plays a crucial role in the health and digestion of sheep and goats, and poor feed quality can trigger bloat.
High-quality feed, especially those rich in legumes like clover and lucerne, can be problematic if not managed properly.
These feeds can cause frothy bloat due to the rapid production of gases that become trapped in a stable foam, obstructing normal gas expulsion.
Low-quality feed, such as spoiled or mouldy hay, can disrupt the normal microbial balance in the rumen, also leading to bloat.
Farmers must ensure that feed is well-balanced, free from mould, and appropriately mixed to promote stable digestion and gas release, thereby minimising the risk of bloat.
Equally important, adequate roughage should be provided to help prevent the onset of this potentially fatal condition. Seasonal variations can significantly affect the availability and quality of forage for sheep and goats.
During the rainy season, pastures become lush and abundant, providing high-quality forage.
However, this can increase the risk of frothy bloat, particularly if the pasture is rich in legumes. Conversely, during dry periods, the availability of high-quality forage diminishes, forcing animals to rely on lower-quality feed.
This low-quality forage can cause digestive problems, like blockages or deficiency of essential nutrients since it may not have enough nutrients and can be hard to digest.
Insufficient or excessive water intake can also contribute to bloat.
Proper hydration is crucial for digestive health, and ensuring a consistent water supply is essential for preventing both types of bloat.
Symptoms of bloat
Early detection of the symptoms of bloat is critical for prompt and timely treatment to avoid serious complications.
One of the most noticeable signs is abdominal enlargement, particularly on the left side, where the abdomen appears swollen or bloated.
This swelling can be severe and is often visible from a distance.
Affected animals will often display signs of discomfort such as restlessness, pawing at the ground or frequently lying down and getting up.
They may also exhibit signs of distress or pain, and in severe cases, the swelling can interfere with normal breathing, causing laboured or rapid breathing due to pressure on the diaphragm and lungs.
Furthermore, animals with bloat may refuse to eat or show a decreased interest in food.
There may also be noticeable behavioural changes, such as isolation from the herd or increased agitation. Affected animals often show signs of anxiety or discomfort, further signalling the presence of bloat.
Bloat prevention strategies
Preventing bloat involves a combination of dietary management, careful monitoring, and good animal husbandry practices. When introducing new feeds or pastures, make changes gradually to allow the rumen flora to adapt. Avoid sudden transitions from dry feed to lush pastures and monitor animals closely during the transition period.
Ensuring that the diet is balanced with adequate roughage, such as hay or straw, helps prevent the formation of excessive foam and reduces the risk of frothy bloat.
Regular evaluation and adjustment of feed formulations based on the animals need to maintain a well-balanced ration is critical.
Monitoring pasture quality is also crucial, especially with high-risk pastures and legumes. If possible, provide access to less risky forages or treat high-risk pastures with anti-bloat agents.
Regular inspections of pastures for potential risks can help make necessary adjustments.
Additionally, ensure that animals have constant access to clean water, as proper hydration aids in digestion and reduces the risk of bloat.
Water sources should be checked for cleanliness and availability.
In some cases, incorporating anti-bloat supplements or additives into the diet can prevent foam formation in the rumen.
Bloat treatment
If bloat is detected, prompt treatment is crucial to prevent severe complications. Immediate intervention is necessary to provide relief for the animal.
For free gas bloat, allowing the animal to belch or using a stomach tube to release the gas can be effective. For frothy bloat, quick action is essential to prevent further complications.
Administering anti-foaming agents such as poloxalene can help break down the foam and release the trapped gas.
It’s important to ensure the dosage is appropriate and administered as directed. In severe cases, manual relief may be necessary.
A veterinarian might need to perform a procedure called a rumenotomy, where a small incision is made in the rumen to release the gas.
This procedure should be carried out by a qualified veterinarian to ensure proper care and minimise complications.
Additionally, medication might be required to treat underlying issues or prevent further episodes of bloat. It’s essential to follow the veterinarians recommendations for medication and treatment plans closely.
Supportive care is also vital, ensuring the animal is in a comfortable environment and monitoring its condition closely.
Providing adequate rest, hydration, and a stress-free environment is essential for recovery.
These supportive measures help the animal regain strength and facilitate a quicker return to normal health.
Conclusion
Effectively managing bloat in sheep and goats requires a proactive approach that combines prevention, early detection and prompt treatment.
Understanding and managing this condition is crucial for maintaining livestock health and productivity.
A comprehensive approach to bloat management — incorporating sound dietary practices, regular health monitoring, and timely veterinary care — not only ensures healthy animals but also ensures economic viability for farmers.
Sheuneni Kurasha is the managing director of Chivara Farm, a diversified farming operation, which specialises in stud breeding for small livestock (Boer goats, Kalahari Red goats,
Damara sheep and Meatmaster sheep) as well as Boran cattle. For feedback, kindly get in touch on email: [email protected]; X: @chivarafarm or WhatsApp: +263 77 2874 523.
Online Reporter