Rumensin 100 Dairy Cattle Premix

Rumensin is a proven and cost-effective way to maximise the performance and health of your herd throughout the lactation. No matter what type of feed is provided or at what time of the year, Rumensin helps your cows to digest their food more efficiently. Features and benefits Improves milk production Reduces severity of non-clinical ketosis Improves feed efficiency Improves growth rates and reproductive performance in heifers Prevents coccidiosis Ideal for use with Tylan to create stable rumen environment Quality premix formulation Nil withholding period Full technical support

Registered indications (Dairy cattle)

Rumensin 100 Premix is registered for:

• Increased milk production under many conditions
• As an aid in reducing the severity of non-clinical ketosis in lactating dairy cattle
• As an aid in the control of bloat
• For improved weight gain and reproductive performance in heifers
• Improved efficiency in pastured cattle
• As an aid in the prevention of coccidiosis caused by Eimeria zuernii and E. bovis.

Proven health and production benefits – lactating cows

Rumensin increases milk production under a wide range of nutritional situations. The average of 11 international trials involving more than 2,900 cows showed Rumensin increased milk production by an average of 1.3 L/day.(1) Numerous studies have confirmed the efficacy of Rumensin in improving milk production under both pasture and intensive feeding regimes (e.g. total mixed rations).(2)
Rumensin increases the amount of energy made available to the cow at a time when her feed intake is naturally low due to the stresses of calving. This extra energy can be used to maximise body condition before calving, and to shorten the duration and severity of the negative energy balance experienced before and after calving. In one study, Rumensin significantly reduced the incidence of ketosis in freshly-calved cows from 50% to 8%, as well as significantly increasing milk production.

Australian and New Zealand trials have confirmed that Rumensin reduces the incidence and severity of pasture bloat in lactating dairy cows.  In one series of four trials, just 1% of animals treated with Rumensin experienced moderate or severe bloat, even under high bloat conditions, compared to 24% of untreated cows. The same trials showed Rumensin increased milk production regardless of whether bloat conditions existed or not.

Proven health and production benefits – calves and heifers

Rumensin prevents coccidiosis caused by Eimeria zuernii and E. bovis, the two pathogenic strains of coccidia commonly found in dairy cattle. By reducing the amount of intestinal damage caused by coccidia, Rumensin helps to improve nutrient absorption and growth rates. Controlled studies have demonstrated that calves fed Rumensin have significantly higher average daily weight gains (0.11–0.34 kg/day) and feed efficiency (+15%) compared to calves that are affected by coccidiosis.  Extensive research and commercial experience have shown that Rumensin can significantly reduce the age of puberty in Holstein heifers. Improved growth rates also help to ensure heifers calve down in peak condition.

Other benefits (non-registered)

Mounting scientific evidence indicates Rumensin reduces variation in daily feed intake. Regulation of intake of high energy rations has been shown to reduce the incidence of digestive disorders, such as acidosis.  The use of Rumensin in combination with Tylan® can further improve the overall performance, efficiency and health of your cows by helping to stabilise the rumen environment. Other trials have demonstrated that cows fed Rumensin lose less body condition during early lactation, recover body condition faster and have a significantly higher body condition score at the end of the lactation than cows fed without Rumensin.  The addition of Rumensin to the ration over summer means more energy is made available to the cow from consumed feed to support milk production, but with the added benefit of less heat produced in the process, thereby helping to alleviate heat stress. Feeding Rumensin during the later stages of lactation will mean less feed is required to maintain production, thereby helping to best utilise available feed.

How Rumensin works Rumensin is a naturally-derived product which alters the composition of the microbial population in the rumen. In effect, it increases the production of propionic acid, the most efficient of the volatile fatty acids needed for milk production and growth. Put simply, this means more energy in the feed is made available to the animal from every mouthful consumed, regardless of feed intake or the level of supplementary feeding. Besides increasing feed efficiency, the active ingredient in Rumensin reduces methane gas production and the build-up of foam in the rumen associated with bloat. Rumensin also exerts powerful anticoccidial activity.

Effect of Rumensin on volatile fatty acid production
  (molar percentage)

Feeding instructions

Rumensin 100 should be thoroughly mixed with other feed components to achieve an effective dosage of 200–450 mg monensin/head/day.
For best results, the addition rate of Rumensin should be managed throughout the lactation according to the level of supplementary feed provided and the level of metabolic challenge. As a guide:

• High production/high feed intake herds, or those facing a high risk of ketosis or pasture bloat, should receive 350–450 mg monensin/head/day to obtain maximum response across the herd.
• Medium production/medium feed intake herds, or those facing a moderate risk of pasture bloat or ketosis, should receive 250–350 mg monensin/head/day to ensure a consistent response across the herd.
• During late lactation, or when there is little risk of ketosis or pasture bloat, an addition rate of 200–250 mg monensin/head/day should be sufficient.
• Consider adding Tylan (11 ppm total dry matter intake) to help create a stable rumen environment and to prevent liver abscesses.