Thousands of stock bulls will change hands over the coming months, with spring pedigree sales in full swing up and down the country.

It’s an important investment on a suckler farm and it should be given the time to make sure you are making the correct decision with your purchase.

For many, it’s one of the biggest spends in the year and deserves some thought before the decision is made.

Timing is extremely important in relation to a couple of items when it comes to bull purchasing. The bull needs to be bought well in advance of the breeding season to allow him become acclimatised to his new surroundings and settled in.

You should also get the catalogue in advance of the sale and spend time comparing bulls in the catalogue and then arrive at the sale in plenty of time to study the bulls at the pre-sale show.

1. Decide what you need the bull to do

What job is the stock bull being bought to do? Is it to breed replacements or is it to breed terminal-type progeny for sale or finish? Maybe you need a bull that will tick both boxes.

Not getting caught up on breeds is important at this point. ICBF has shown that there is more variation within breeds than there is between breeds.

Focus on quality no matter what.

If it’s a bull to breed replacements, focus on the maternal index with particular focus on milk and fertility. If it’s producing finished cattle or weanlings focus on the terminal index, paying particular attention to carcase weight and carcase conformation.

Calving difficulty should be on the top of the list and avoid bulls with excessive calving difficulty. Some full-time farmers may be able to deal with a higher calving difficulty figure but proceed with caution with very high calving difficulty figures.

2 Look at the bull

It may seem stupidly obvious to state this but I have heard of instances recently where bulls have been bought over the phone based on a catalogue page or a tag number.

Just because a bull has high indexes, doesn’t mean he will be fit for purpose and it’s important that you give the bull a full physical examination before you make the purchase.

There are a number of areas which are very important. Look at the bull’s overall conformation to make sure you are happy. Look for length and a clean body.

Make sure the bull has good feet and stay away from bulls that have been pared or trimmed as this will have to be continued later in life.

Make sure the bull stands up straight on his back legs (these are the legs that will be under the most pressure when serving) and make sure the bull walks well with no limps or stiffness.

Obviously one of the most important parts of a bull is his testicles, so make sure all is OK in this department.

any pedigree breeders and society sales have moved to fertility testing bulls but still carry out a quick examination for any deformities.

Watch the bull walk around the ring and pay attention to how nervous or unsettled he is. Talk to the breeder about the bull and his pre-sale feed and health management.

3 Understanding the catalogue

Nearly all bull sales now carry the ICBF catalogue format at sales. This allows purchasers compare different bloodlines and also the terminal and replacement index and what helps make up these indexes.

The terminal and replacement indexes are detailed on the catalogue page.

For those farmers participating in BDGP, a genotyped four- or five-star bull on either index needs to be on the farm on 30 June 2019.

This means that a bull must have four or five stars in either of the green boxes shown in Figure 1 to be eligible.

Calving difficulty is another very important figure and for heifers you should aim for 5% or below and for mature cows, you should stay below 12%.

However, this will depend on the farmer’s experience at calving the cows and other factors such as cow type, etc.

Reliability should also be looked at and if possible buy a genotyped bull as a genotyed bull will have greater reliability and hence less chance of his figures changing in the future. Bulls will have a helix (Figure 2) stamp in the catalogue if genotyped.

4 Keeping the stockbull working and healthy

It’s essential that you don’t overwork a young stock bull in his first year. Twenty to 25 cows is the maximum in a young bull’s first year serving.

After a bull is bought, he should be allowed settle in the farm with a few cows in a paddock and then gradually introduced to the breeding herd.

A bull should be observed mounting and serving to make sure he is inseminating the cow on heat. You should also keep accurate breeding records and if there are a high number of repeats, prompt further investigation will be needed.

Stock bulls should go on the same vaccination programme as the cow herd and should be dosed for worms and fluke accordingly.

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Pre-breeding NCT for the stock bull