I think you should just follow your gut on this one, there is something special I have noticed in each of my dogs that made them mine without a doubt. When your baby comes along I think you will know it. I too am partial to the older puppies or adults. But when I saw Copper's sweet dark face he was only 10 weeks old, and after I held him and played with him I knew that he was my boy. Maddie was 5 months when I got her and it was all that attitude that made me choose her. Well, actually she chose me
I think that you will just know