Sire Detail - GBR 9110 (Peter)

(Picture taken as young ram lamb)


Peter is a 2019 ram lamb out of Morgan and Chloe, one of my favorite ewes. His dam is an excellent mother and we have kept most of her daughters in our flock. She is a very prolific ewe who produced two sets of triplets and had quadruplets in 2019. On the same day Peter was born we had another ewe with stillborn lambs, so we fostered two of his siblings to her so Chloe did not have to raise quadruplets on only grass.

Peter brings excellent growth, good parasite resistance and very high maternal traits. We used him as the clean up ram.

His EBVs for growth are good with weaning weight (WWT) in the top 25% and post weaning weight (PWWT) in the top 20%. He has good parasite resistance with weaning fecal egg count (WFEC) in the top 20% and post weaning fecal egg count (PFEC) in the top 15%. He is in the top 10% for number of lambs born (NLB) and in the top 20% for number of lambs weaned (NLW). He is in the top 25% for USA Hair index

Basic Detail



Birth Type


Codon 171



BUL 18403


DIF 02

Below we show his NSIP (National Sheep Improvement Program) EBVs (Estimated Breeding Values).

We realize that not everybody is familiar with this.

NSIP Detail

ID 6401552019GBR110

* Data at NSIP link is updated less frequently.

Values in parenthesis below indicate where the value preceding it falls in the NSIP percentile report. 

E.g. WWT 2.26 (85%) : This value is in the highest 15% in NSIP for WWT, about 85% of animals have a WWT that is lower than this value and 15% of animals have a WWT that is higher than this value.

Data Date

# Offspring

# Flocks





0.368 (85%)



2.019 (75%)


3.762 (80%)


3.518 (85%)

Parasite Resistance



-69.66 (80%)

-94.82 (85%)




-0.672 (85%)

-0.508 (30%)



0.381 (50%)


17.4% (90%)


14.8% (80%)


Hair Index

Not available

106.74 (75%)

Percentile Summary

The Radar Chart below provides an overview of where the sire EBVs are ranked on the NSIP percentile report. The 100th band is the top performing and 0th band is the bottom performing, the 50th band is the median. What is best depends on what you are looking for and what the performance of your ewes are, e.g. we do not try to maximize the NLB (number of lambs born), the 10th percentile of NLB results in about a 200% lambing rate, very high NLB is hard to support in a 100% grass/forage management system.


NSIP (National Sheep Improvement Program) Acronyms / Nomenclatures

  • BWT - Birth Weight (Top / 100th percentile is highest BWT)

  • WWT - Weaning Weight (Top / 100th percentile is highest WWT)

  • PWWT - Post Weaning Weight (Top / 100th percentile is highest PWWT)

  • HWT - Hogget Weight (Top / 100th percentile is highest HWT)

  • WFEC - Weaning Fecal Egg Count (Top / 100th percentile is lowest WFEC)

  • PFEC - Post Weaning Fecal Egg Count (Top / 100th percentile is lowest PFEC)

  • PFAT - Post Weaning Fat Depth (Top / 100th percentile is lowest PFAT)

  • PEMD - Post Weaning Eye Muscle Depth (Top / 100th percentile is largest PEMD)

  • MWWT - Maternal Weaning Weight (Top / 100th percentile is highest MWWT)

  • NLB - Number of Lambs Born (Top / 100th percentile is largest NLB)

  • NLW - Number of Lambs Weaned (Top / 100th percentile is largest NLW)

  • PSC - Post Weaning Scrotal Circumference (Top / 100th percentile is largest NLW)

  • Hair Index - (Top / 100th percentile is highest Hair Index, also called Index or USA Hair Index)

* NSIP ranking for EBVs are based on the February 2020 percentile report. Learn more.