Her life has so much meaning now. When rescuers saved a blind beagle named Maria from a Chinese laboratory, they thought they were saving one dog’s life. But they ended up saving seven lives. Maria, who is now 10 years old, had spent her entire life in a cold, steel cage in a laboratory in Cheng Du, China. “I can’t say 100 percent for sure, but it’s obvious that she’s been used as a breeder,” Shannon Keith, president and founder of Beagle Freedom Project, a rescue group based in California,…