Reintroducing cutting-edge bolus manufacturing and technology
Keith Greig, managing director at Denis Brinicombe Group, explains how boluses, manufactured for ultimate efficacy will be back on the shelves, while introducing their new partnership with Rumbol Products and the EnduraBol range. Leading animal nutrition provider, the Denis Brinicombe Group,
has partnered with expert bolus manufacturer, Rumbol Products, to reintroduce cutting-edge bolus manufacturing and technology in the marketplace. Over 40 years’ experience in UK animal nutrition and bolus
manufacturing expertise has gone into producing the new EnduraBol range, encompassing of EnduraBol Cattle and EnduraBol High Iodine, both of which are manufactured using Rumbol Products’ original, patented bolus technology.
EnduraBol manufacturing and commercial timeline 1988 - Rumbol Products was established by Dr Norman Ritchie, a scholar and lecturer in agricultural nutrition at the University of Glasgow, who produced the world’s first patented sustained release bolus 1993 – Rumbol became the silent manufacturing partner of boluses for a global distributor October 2019 – Rumbol Products suffered a catastrophic fire, destroying the manufacturing facility and ending the partnership with the global distributor July 2020 – A deal was agreed for the Denis Brinicombe Group to lead a global joint venture with Rumbol Products to produce boluses in a newly-built factory in Clydebank, Scotland September 2020 – Rumbol Products continues to manufacture the original bolus using the same patented technology under the new EnduraBol brand, sold by B2B Nutrition, part of the Denis Brinicombe Group
Types of bolus and how they work There are predominantly two main types of cattle bolus available in the marketplace – a leaching bolus and an eroding bolus. Leaching boluses work under pressure and gradually release
nutrients into the rumen, while eroding boluses dissolve from the outside inwards and can occur in two ways. When the entire bolus begins to dissolve and releases trace elements within the animal, this is known as ‘whole surface area erosion’. However, there is another way an eroding bolus can release
nutrients, this is known as a ‘single point of erosion’ from a constant surface area, which is how the EnduraBol range is built to perform. With a single point of erosion from a single construction, EnduraBol works in a similar way to a burning candle. A candle burns from the top to the bottom, but no matter how long
or short a candle is, the burning area is always the same circumference. The long-term, consistent erosion of trace elements and vitamins from a single-construction EnduraBol bolus ensures a sustained release of nutrients entering the rumen on a daily basis for up to 240 days.
Manufacturing process The type of bolus and how it is manufactured will affect the volume and variety of trace elements and vitamins included within it, as well as how long it provides the animal with a supply The reason why few vitamins are usually found in standard
boluses is because if heat is used in the manufacturing process, this denatures vitamins and renders them in active to animals. However, the EnduraBol
manufacturing process in the Rumbol Products factory consists of a cold pressure treatment, with no heat involved. This provides vitamin stability during the manufacturing process while the bolus is being formed into a robust, single construction. Following the cold pressure
treatment, the bolus is dipped in a crystic resin, dried and then dipped again for an impenetrable twin-coated resin finish. EnduraBol boluses are also dipped in wax at the top, to ensure they are sealed at the point of manufacture to avoid oxidisation, meaning their use is fully optimised when entering the rumen. As the bolus begins to erode
in the reticulum, the top of the resin coating chips away in small
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