Though her dog-centered business is brand new, Marie Maguire’s love of “man’s best friend” goes back decades. A yellow Labrador retriever, ‘Sammy,’ arrived in the Maguire family’s home on the north side of Dublin, Ireland when she was 13. Sammy was “a perfect yellow ball of love and licks” who would “talk” with Maguire and her four siblings on the phone when they were away from home,” Maguire, 43, a Stamford resident, recalled on a recent afternoon. Maguire and her brothers and sisters—Susan, Patrick, Ciaran and Roisin—considered Sammy a “fifth sibling,” she said. Though the beloved yellow Lab has passed, Maguire’s abiding love and respect for dogs has endured, and after eight years of laying the groundwork—with a few detours along the way— she’s recently launched her own mobile dog grooming business.