Just to make it clear , i didnt buy him from a pet store but a specific reptile shop with an experienced reptile owner for many years who still saying its ok for them to live together . I have today picked up another vivarium although its too small to house for long it was quick fix untill pay day. The dragons are both 4-5 months old ( about 11 inches from nose to tip or 5 inches from nose to vent) I did research but the web is just a mine field of information so yes i trusted the reptile shop owner for his final thoughts on the matter. They have already sorted a 'pecking' order, the female is infact boss with the male submissing to her, Just need to get the temp right and he will be moving into his temp home.