Oddly enough the female rat out of the group we just adopted is giving birth as we speak! The previous owners said she had been kept seperate from the boys...she has been seperated since she came here. we had debated about allowing her to have a litter but after researching and realizing they she was probably over 1yr. we decided against it. will post photos soon... wish me luck...or wish Bonnie luck! Bonnie is a beautiful well tempered dumbo siames.