HOLLYWOOD—A search was under way Feb. 25 for the assailants who shot a dog-walker in Hollywood and made off with two French bulldogs owned by pop star Lady Gaga, who is offering a reward for the return of the animals. The shooting occurred about 9:40 p.m. Feb. 24 in the 1500 block of North Sierra Bonita Avenue, according to the Los Angeles Police Department. The wounded dog walker was taken to a hospital in unknown condition, police said. Police did not name the victim, but friends identified him as 30-year-old Ryan Fischer. Fischer was walking three of Lady Gaga’s dogs at the time, and the attackers made off with two of them, named Koji and Gustav. A third dog, a black French bulldog named Miss Asia, was recovered. TMZ obtained surveillance video that captures the shooting, apparently from a home security system on Sierra Bonita Avenue. The video shows Fischer …