Skip to the content

Rams on Test

RamCompare measures the performance of recorded rams across all terminal sire breeds for growth and carcase traits. New carcase trait performance measures have been developed, so that industry can make better breeding decisions and ultimately improve farm profitability.

We rely on breeders to nominate their rams each year for the project; selected rams are put on test at one of our commercial farms.

Ram Nominations

The project is looking for rams with Estimated Breeding Values (EBVs) in the top 20% of the breed. Natural service sires should be shearlings or stock rams with a known, high health status. Older stock rams are welcome providing they are fit and fertile. RamCompare will also purchase frozen semen in batches of 30 doses for use via artificial insemination (AI).

We use an online nomination site where full breeder and ram details can be provided. There are two specific websites, one for nominations of semen for Artificial Insemination (AI) sires and one for the nomination of rams for sale for use as natural service sires. Nominations close in March and we select a team of around 70 rams from 200 +ram submissions. Selections are based on ram performance and pedigree criteria.

Now beginning its eighth year, RamCompare has tested 401 terminal sire rams, producing more than 38,500 lambs from commercial ewes, mated using artificial insemination (AI) or natural service. 

Pedigree terminal sire breeders are encouraged to submit ram nominations to RamCompare, the national progeny test, as the project enters an exciting new phase. Nominations are now open and close on 12 May 2023.

All successful candidates are contacted directly so that confirmation can be agreed. We then contact all other breeders to thank them for their support and confirm that the selection process is complete.

Natural service rams: All rams are used as single sire mating groups with 30-90 ewes each. 

Due to the strict biosecurity involved with the purchase of rams as natural service sires for our partner farms, we ask for health documents to be uploaded with the nomination submission. Natural service rams are purchased and placed into quarantine on our host farms, the project vet conducts a thorough health and fertility MOT at each quarantine facility. The rams will remain in quarantine until all health tests are confirmed, only negative rams will be released from quarantine onto the designated farms, any non-negative rams may be rejected. Any health issues arising are discussed directly with the original breeder and in the case of a rejection a replacement ram may be sourced if possible.

AI sires: We purchase frozen semen to use as AI sires for groups of 30 ewes. We will liaise with breeders and their AI centres to ensure all involved are aware of the date semen is required, to ensure all orders are confirmed and organised correctly.

All their commercial progeny are measured from birth to slaughter for a number of attributes, including body weight, muscle: fat ratio, carcase weight and conformation. This information is linked to their sire to create Estimated Breeding Values (EBVs) for traits of economic importance help identify the most profitable rams within the population. We publish a booklet of results each year in the spring to coincide with the start of the ram selling season.