(Photo Credit:
@the.invisible.8/Instagram) Splashing around in a backyard pool is usually the highlight of any energetic pup’s summer day. A bittersweet Instagram video posted by @the.invisible.8 shows a beautiful shelter dog named Dino doing exactly that, but there’s a sad backstory. This five-year-old boy originally arrived at a New York rescue as a frightened stray on a cold January evening. Dino initially spent his days curled up under a bl…