A brave 7-pound pooch trying to protect three little kids in his family was heartlessly slapped out a third-story window by a cop on a failed drug raid, a lawsuit charges. Chuwie, a miniature Doberman-Pomeranian mix, miraculously survived, but his owner says the family pet hasn’t been the same since. “How could a police officer do that to a tiny dog?’’ said Iris Ramos, whose son-in-law, Ronald Estevez, 27, owns Chuwie. The dog never tried to attack a cop -- all he did was bark, according to the family’s Bronx Civil Court lawsuit against the city and NYPD for unspecified...