AUTHOR=Zhang Shiqi , Yimamu Mireguli , Ma Chen , Pan Jun , Wang Caidie , Cai Wenjie , Yang Kailun TITLE=Dietary guanidinoacetic acid supplementation improves rumen metabolism, duodenal nutrient flux, and growth performance in lambs JOURNAL=Frontiers in Veterinary Science VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2025.1528861 DOI=10.3389/fvets.2025.1528861 ISSN=2297-1769