The Hermetia illucens larva meal up to 15% in dog food linearly increased the molarities of acetic and propionic acids in faeces.The relative abundance of Phascolarctobacterium, Megamonas, Collinsella and Fournierella genera was higher in faecal by 7.5% Hermetia illucens in dog food.Blood IgE, BUN, creatinine, AST, ALT, cholesterol and triglyceride concentrations did not change by dietary Hermetia illucens larva meal.The extruded food containing up to 15% larva meal did not alter nutrient digestibility, body weight and faecal score in large breed dogs.