Can you predict adult temperament? At what age can you start to feel that temperament is 'set'? I'm very curious about others' opinions on this. Rhys is almost 6 months old and I am very, very happy with his temperament. He's very correct temperamentally for an Amstaff and I love pretty much everything about his personality. I expect some maturity and changes as he grows, but my personal opinion is that his temperament is pretty well 'set'. He's been a relatively easy puppy and very confident and outgoing. He comes from a line of dogs much the same as him. Barring any traumatic experience or illness, I expect him to remain this way into adulthood. Thoughts?