1 - Buy Gizka poison from the vendor in Tatooine's landing pad, or (I think) the vendor on the landing pad walkway on Kashyyyk. Then feed this to any one Gizka on the Hawk
, leave, re-enter, problem solved!
2 - Convince that one Selkath in Manaan's docking area looking for 'new and exotic species' to take them. He'll need convincing, either mind trick (DS points) or money. When you go back, the critters will be gone!
EDIT: Blast! Beaten to it...