Making a decision on mineral supplements

IT SEEMS that every spring, more and more products are becoming available to supplement minerals to benefit fertility. There is a never-ending list of boluses, drenches and licks that all claim to give your cow the best chance of going back in calf.

So, how do you figure out what, if any, product is best suited to the cows in your herd?

Find out first what deficiencies exist in your herd. A blood sample can be taken from 8-10 cows to determine levels of the most important minerals concerning fertility. A silage mineral analysis can also be a good indicator of mineral levels on a farm.

Once deficiencies are discovered, seek advice on what product to use. Impartial advice is hard to find. How often have we discussed a problem with a caller to the farm to be immediately told: “Well I have just the product for you!” Your vet is best placed to dispense impartial advice on the best mineral supplementation product to use based on detailed knowledge of your herd.

Consider the availability of help and the type of facilities you have. For example, a bolus may be the best supplementation option on paper, but if you are on you own with less than ideal handling facilities, then another product may be better suited.

Copper, Iodine, selenium and phosphorus are the most important minerals when it comes to fertility. A deficiency of any of these in the diet of the dairy cow can lead to decreased conception rates and ultimately higher empty rates.

A deficiency alone may not be the full issue. Copper deficiency can not only be caused by a lack of copper, but also due to high levels of molybdenum which binds up copper in the cow’s rumen rendering it unavailable. A product containing protected copper is vital in situations such as this.

A little money spent on sampling will give you a more accurate picture on the mineral status of your herd and will ultimately save you money in the long run.