[[ubuhake]], in which Tutsi patrons ceded cattle, and therefore privileged status, to Hutu or Tutsi clients in exchange for economic and personal service, and uburetwa, a corvée system in which Hutu were forced to work for Tutsi chiefs. Rwabugiri's changes caused a rift to grow between the Hutu and Tutsi populations. The Twa were better off than in pre-Kingdom days, with some becoming dancers in the royal court, but their numbers continued to decline.