young energetic dog on a walk. border collie.

young energetic dog walk border collie sunstroke health pets summer how protect your from overheatingtraining dogs whiskers portrait closeup enjoying playing walking grass green canine doggie obedient behavior sitting tongue pink veterinarian cheerful black white thoroughbred teeth care growth funny puppy outside fur park pedigreed pet domestic animal doggy smile outdoor thirst heat overheating standing playful activity attentive cutie bokeh