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Making your Bull selection easier...

Download our new spreadsheet and simply filter on the relevant trait columns.

Telephone your breeding adviser for assistance on 01823 430317


Our online personalised brochure service enables you to select bulls using a wide variety of traits, specific to your needs!

Download speeds will vary depending on your internet speeds - we recommend to download around 6 - 10 of your favourite bulls at a time.

Telephone your breeding adviser for assistance on 01823 430317

About Mastergen

Mastergen has been created to take advantage of the demand for the best value genetics through direct marketing and the exciting opportunities which genomics brings to the AI industry.

Our portfolio of Holstein bulls supplied to us by one of Europe’s largest farmer co-ops Masterrind, have been sourced from countries throughout Europe, North America, Canada and a large number from the UK. Our range includes Genomic, Proven and some interesting Polled bulls from some of the most exciting and elite cow families around the world.

Mastergen supply British Blues from the Twyning Ash herd, one of the most reliable sources in the UK. We also supply a unique range of Homozygous polled beef breeds including Simmental, Limousin and Charolais.

Our latest news

Parliamentary Review 2016/2017 Agriculture

Monday 18th September 2017

We are proud to announce that Mastergen is featured in this years Agricultural edition of the Parliamentary review Parliamentary-review

Alison Dunphy
Alison Dunphy
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Mastergen launch 2 new Dairy bulls at the UK Dairy Day

Tuesday 12th September 2017

Mastergen launch 2 New Bulls at the UK Dairy Day.   Rapidly growing bull semen supplier Mastergen, will expand their already impressive product offering by adding two new sires at this year’s UK Dairy Day.   BESTDAY Bestday storms in to the top 20 UK PLI rankings with £729, and is also the 6th highest…

Joseph Cordy
Joseph Cordy
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Any Questions?

If you require more information about our products or services please leave your contact details here and we will get back to you.

Meet the team