Or move your base there , move pigs is a real pain in the game right now
Have same luck in my 2nd good seed but i didnt get a formal base yet so i make my base close to the runestones and make a breed tower right there , was far too easy than move then into a boat
And yes , if you breed 2* with 1* there is 50/50 chances to get 2* or 1 * , when breed enought 2* kill all 1* pigs ...