Microplastics in manure: Sources, analytical methods, toxicodynamic, and toxicokinetic endpoints in livestock and poultry

•Fecal matter is a key determinant of microplastics ingestion by farm animals.•The sources, analytical methods, and fate of microplastics in manure were recapped.•Microplastics exhibit different behaviour during manure treatment.•The toxicokinetics covers the metabolic reaction, and excretion of microplastics by farm animals.•The toxicodynamic study covers the toxicity of microplastics in poultry.