Optimising Lamb Growth Through Low-Stress Weaning and Correct Mineral Supplementation

This project aims to investigate a common challenge within flocks, the "performance check" observed in lambs following weaning. We aim to determine if a strategic combination of mineral supplementation, guided by a comprehensive farm trace element audit, and reduced-stress weaning protocols can significantly improve daily live weight gains (DLWGs) and mitigate this post-weaning performance dip in Welsh mountain ram lambs.

The transition from milk to forage, coupled with separation from ewes, is a period of stress for lambs, often leading to reduced feed intake and subsequently, a slowdown in growth. Nutritional deficiencies, particularly in essential trace elements, can enhance these challenges. By proactively addressing potential mineral imbalances and minimising weaning-related stress, we will evaluate whether we can support robust lamb growth and health during this vulnerable phase.

Welsh mountain ram lambs will be randomly allocated into three groups, ensuring an even distribution of initial weights. All lambs will undergo a standardised, low-stress weaning process, which includes pre-weaning worming treatment (if required), early administration of mineral supplementation, and a gradual separation from ewes by moving them to their designated post-weaning pasture prior to the weaning date.

Each group will receive a different mineral supplementation strategy to compare efficacy. A control group will receive the farm's standard low-copper drench, a second control group with increased copper levels, and an experimental group receiving a bespoke "home recipe" drench. Lambs will be weighed at regular intervals to monitor DLWGs, and blood samples will be collected to assess systemic mineral levels.

The project will contribute to the Sustainable Land Management outcomes including:

• High animal health and welfare
• Resource efficiency
• Reduced GHG emissions