RexSo I was breading rexs for two weeks no mutation. 15s read 2 points 📖 Stories Jul 9, 2021 ReportSo I was breading rexs for two weeks no mutation. Bred them for two more weeks no mutation. Then I bread them for five more weeks and shot them all because the was no mutation. SO CAN SOMEONE PLEASE TELL ME HOW TO GET A MUTATION.