rule 34 4 arms after vore ambiguous gender ambiguous prey anthro big penis border collie canid canine canis cock vore collie cuon alpinus domestic duo erection flexing genitals herding huge cock hyper hyper genitalia hyper penis imprint male mammal multi arm multi limb neck tuft nipples nude pastoral penile penis sachiel 666 salmon background sheep size difference smile tuft vein veiny penis vore 3777410