Casper the grinning dog and Romeo the scowling cat prove a hit on Instagram Gwyn Wright CASPER the friendly dog gives a big grin — while Romeo the cat scowls. But opposites attract, as six-year-old smiley Samoyed Casper is best pals with grumpy looking Himalayan Persian puss Romeo, two. 4 4 It seems that opposites really do attractCredit: Caters These adorable fur-siblings with pristine white coats have become Instagram stars due to their completely different facial expressions and antics. They live a fun-filled life with owner Rinsa Li, 29, from Christchurch, New Zealand and travel around the countryside together. Rinsa said: “It’s so humbling