alert
alertness
animal
black
breed
brown
canine
cool
danger
dangerous
defend
doberman
dog
domestic
faithful
friend
friendly
friendship
furious
guard
guard dog
laying
looking
mammal
muscular
nature
pedigree
pedigreed
pet
protect
puppy
purebred
rottweiler
rottweiler dog
running
security
snow
strong
tongue
verterate
young