The Big ImageBoard (TBIB) - anal anal penetration ass up backsack balls black bars black body black fur black nose black spots blue collar blue eyes blue leash blurred background brown body brown fur canid canine canis close-up collar collar only cutaway d-ring denali dane digitigrade dog food doggystyle domestic dog duo feral feral on feral feral penetrated feral penetrating feral penetrating feral food from behind position fur genitals german shepherd great dane herding dog hindpaw imminent knotting intraspecies knot leash leash in mouth leash pull letterbox male male/male male penetrated male penetrating male penetrating male mammal mastiff mat miraoff molosser object in mouth pastoral dog paws penetration penile penile penetration penis penis in ass perineum pet bowl pet food power bottom quadruped sex spots spotted body spotted fur teal collar teeth toby (blackwolf89) white body white fur yellow eyes