Home » Products » Sheep » Sheep Vitamin & Mineral Supplements » COB-I-SEL Micro Bolus

COB-I-SEL Micro Bolus

A slow release 25-day cobalt supplement for finishing lambs that also delivers iodine, selenium and multi-vitamins. 

COB-I-SEL 25 has been developed specifically to help maintain optimum cobalt levels in rapidly growing lambs finishing at grass and produce quality carcasses at finish. Its formulation also makes it ideal for targeted use during the ewe’s production cycle, such as at pretupping or around lambing.

The majority of UK grazing is cobalt deficient, particularly if it has been improved with practices such as liming

Cobalt is required for rumen synthesis of vitamin B12 and vitamin B12 is required for energy production

There is very little storage capacity in the body for cobalt and Vitamin B12, so the animal relies on a daily intake from feed, forage or grazing

If forage or grazing is lacking in cobalt, animals become cobalt deficient very quickly, and may suffer from the resulting condition known as pine

Pine will cause poor growth and wool quality in lambs resulting in small lambs with poor body condition. These lambs will take far longer to finish resulting in significantly increased days to slaughter and inferior carcass quality


Contains: Cobalt, iodine, selenium, multi vitamins and (copper)

Size available: 1 x 250 micro boluses with copper (Code 5453) 1 x 250 micro boluses without copper (Code 5782)  

Application: Lambs 1 x micro bolus. Ewes 2 x micro bolus

Administer: from five weeks of age


Also availble:

COB-I-SEL Micro Bolus balling gun

A specially designed balling gun for the administration of Cob-I-Sel. (Code 5485)