border collie dog living

acrobatic adorable agilitydog animal athletic attentive attractive beligium border canicross canine collie docile dog domestic endurance energetic english faithful fearful flyballdog friend frisbeedog guidedog image intelligence intelligent living mammal nature obedience obediencedog outdoor pet photo polyvalent positive precise protective puppy purebred receptive running scottish sheepdog soft sportsdog timid training vigilant vivacity voluntary working