The researchers said they found that the relative risk of being bitten by a German shepherd or a Doberman was about five times higher than for a Labrador retriever or a mixedbreed.
报告还说，狗在整个演化过程中始终是群居动物，狗群中存在特有的等级统治秩序。
2
It's not clear how the 2-year-old mixedbreed Ban and her master were separated, but Kessenuma is located in Miyagi prefecture, which was virtually wiped out by the disaster three weeks ago.
Owner David Richardson, 76, said he got the mixedbreed dog from an animal home about 26 years ago when she was at least three years old, making Bella's age more than 200 years in canine years.