Yup they called it "seasoning". Many slaves were "broken in" for a couple months then sent up north. Especially to the Deep SouthOne thing that I would add about finding out about the ethnicity of African people is that it is not always cut and dry. I ran GEDMatch on my results to find out my closest ethnicities. Before the results show my African ethnicities; it first showed that after African American I am most closely to the Caribbean people in the Dominican Republic.
I don't know why that is, but I know that some slaves were taken to the Caribbean before being taking to the USA.