忠誠
alertness
animal
baring teeth
black
bodyguard
breed
brown
canine
companion
dog
domestic
ear
face
faithful
fierce
fur
german
german shepherd
guard
head
howling
indoors
inside
k9
loyal
mammal
muzzle
obedience
pedigree
pet
pets
police
police dog
portrait
protection
purebred
security
shepherd
studio
tags
teeth
tongue
young