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Study highlights survival costs of ewe reproduction
The study found that females with offspring had bigger gut worm infections than females which didn’t reproduce.

Researchers assess a wild population of Soay sheep

A new study published by scientists at the Moredun Research Institute and the Universities of Stirling, Lancaster and Edinburgh has revealed how reproduction can affect a ewe’s survival.

In the study, researchers examined a wild population of Soay sheep living off the west coast of Scotland. They found that females with offspring had bigger gut worm infections than females which didn’t reproduce.

Furthermore, the ewes that successfully suckled their lamb through to weaning had higher parasite counts than those whose lamb died soon after birth. The study is published in the journal Ecology Letters.

Study leader Jessica Leivesley commented: “The resources which a female must channel into producing her lamb means that less energy remains to fight infections. Our results also suggest that lactation is particularly costly, because females that weaned their lamb had even more parasites than those whose lambs died and therefore didn’t need to lactate.”

The study also found that ewes with bigger worm infections in spring had lower body weight in summer and were less likely to survive over the following winter to breed again in the future.

Senior author Dr Adam Haywood said: “We’ve known for a long time that reproduction can affect survival. What our new study does is to provide an explanation for why this might be the case: we’ve discovered a complex but clear pathway linking reproduction to increased infections and reduced survival.

“While all organisms strive to reproduce, it has its costs, and as the father of an eight-month-old this research has recently taken on a new relevance to me!”

Image (C) Tomek Augustyn.

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Practices urged to audit neutering data

News Story 1
 RCVS Knowledge has called on vet practices to audit their post-operative neutering outcomes.

It follows the release of the 2024 NASAN benchmarking report, which collates data from neutering procedures performed on dogs, cats and rabbits.

The benchmarking report enables practices in the UK and Ireland to compare their post-operative outcomes to the national average. This includes the rate of patients lost to follow-up, which in 2024 increased to 23 per cent.

Anyone from the practice can submit the data using a free template. The deadline for next report is February 2026.

Visit the RCVS Knowledge website to complete an audit. 

Click here for more...
News Shorts
RCVS pays tribute to well-loved equine vet

The RCVS and the Riding Establishments Subcommittee has paid tribute to well-loved veterinary surgeon and riding establishment inspector, Rebecca Hamilton-Fletcher MRCVS.

Linda Belton MRCVS, RCVS President, said: "I, along with my colleagues on the RESC, RCVS Council, RCVS Standards Committee, as well as RCVS staff, was very saddened to hear of the sudden death of Rebecca, or Becca as we knew her, last week.

"She was a true advocate for equine welfare and in her many years on the RESC worked to continually improve the quality and consistency of riding establishment inspections, all in the interests of enhanced horse welfare and rider safety."