If it's okay for non-sentient animals to be eaten even if there are members of its species that are sentient, is it okay to eat humans that were born non-sentient?
* Technically, the sentient carnivores tend to go for the non-sentient prey animals rather than its own non-sentient species (i.e. a sentient lion eats a non-sentient deer but never a non-sentient lion), but that's probably just splitting hairs.
** Humans tend not to eat non-sentient apes, so it's a valid point.