Proto-dogs scavenged around the outskirts of human settlements about 10, 000 to 12, 000 years ago, removing food scraps, feces, and other human waste.
大约10000-12000年前，原始犬类远居于人类居住地，清除残羹、粪便和其他的人类垃圾。
Proto-dogs scavenged around the outskirts of human settlements about 10, 000 to 12, 000 years ago, removing food scraps, feces, and other human waste.
大约10000-12000年前，原始犬类远居于人类居住地，清除残羹、粪便和其他的人类垃圾。
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