Blackberry Black Dog Cocktail

"This Black Dog Cocktail combines blackberry and grapefruit to make a wonderfully tasty drink. When thinking about the Salty Dog, I couldn't help but to think what the drink might taste like with a fruity, sweeter twist. This drink really tries to pay homage to the greyhound and salty dog, but twists it up a bit with blackberries and a sugar rim. Oh, and maybe a bit of an homage to Led Zeppelin. Enjoy this awesome cocktail."