Abstract

Broiler leg diseases are a common abnormal bone metabolism issue that leads to poor leg health in growing poultry. Bone metabolism is a complicated regulatory process controlled by genetic, nutritional, feeding management, environmental, or other influencing factors. The gut microbiota constitutes the largest micro-ecosystem in animals and is closely related to many metabolic disorders, including bone disease, by affecting the absorption of nutrients and the barrier function of the gastrointestinal tract and regulating the immune system and even the brain–gut–bone axis. Recently, probiotic-based dietary supplementation has emerged as an emerging strategy to improve bone health in chickens by regulating bone metabolism based on the gut–bone axis. This review aims to summarize the regulatory mechanisms of probiotics in the gut microbiota on bone metabolism and to provide new insights for the prevention and treatment of bone diseases in broiler chickens.

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