Ludi, I have seen your comments that Ace never seemed very affectionate towards and in another place I noticed that you said that he had spent his first 4 months in the presence of other dogs.  I feel that he was dog-bonded rather than people-bonded.  They need people contact as soon and as often as possible.  I adopted a cardi when she was 16 mo. old and she had been sold with her litter mate sister and I understand that that is another bad thing as they will always bond primarily with a little mate.  My girl had been abused when I got her (apparently by a woman) so we struggled for years but she was just scared to death of me when I got her.  When she was 3, I got a baby pem and she was thrilled and adopted the pem as her baby.  It appears that Ace loves his baby sister and you have probably made him very happy.  I suspect he will always be a little distant.  I wish you had had my baby Randy to train.  He is so smart (and spoiled rotten) and I am too old to have trained him properly. 

Lois

Considering how well you have trained Ace, I imagine that Lady will be the star of anything you give her an opportunity to do.  Ace will love it too.  That bit of sharing the big antler was a marvelous example.