Yep, human's. But they would conserve their strongest, yet limited, members. Ink seems to be different from the other Zs and the Inklings are different altogether. He seems to have only a few of them.
Kimmet thwarted a population explosion with a nuclear explosion. The Boulder and Ft Irwin
Inklettes (or ADLO 2.0) are the only Inkling-turned Zs we've seen. Is Ink trying to create a population of his own? Instead of evolutionary changes, this would be like an attempt at Zombie husbandry & domestication.
Old Bill Roberts had a farm I.N.K.L. ING., and on his farm he had #1, I.N.K.L. ING.. With an argh argh here and a die die there, here an argh there die everywhere an argh die...
This begs the questions, can a regular Z become an Inklette? Even more chilling, are there any more humans left in L.A. to turn into Inklings? What happened to the humans
Burt saw being dragged towards
the hospital by the Z army when they were looking for the helicopter?