What does ANIMALS OF A BASE NATURE mean?

ANIMALS OF A BASE NATURE meaning in Law Dictionary

nimals in which a right of residential property is obtained by reclaiming all of them from wildness, but which, at common-law. by explanation of their base nature, are not thought to be possible subjects of a larceny. 3 Inst. 109; 1 Hale, P. C. 511, 512.