How many animal species are currently being kept in domestic domestic captivity?

Not being allowed to ever roam on their own (this excludes cats). Several animals, except for nationally protected ones, are existing illegally outside of captivity. Why are more those particular animals undergoining sich a plight? Can we reason, as the more human, less abusive (mostly northern) slave owners did, that they're not suffering ( directly) ? No, they're not slaves, of course not, but WE certianly value our own freedom. Does not a pet...and I keep one myself, kept according to the laws.. posess enough awareness to know when it is being screwed out of its own natural entitlement to freedom? Wouldntyou know? How many species are being passively abused...not by owners, certianly, we do love our pets..but by the laws of an industrial society?