wish i could help. I had to pick Layla from online photos when she was 3 weeks- they all look a like! will you get to see the puppies or is it by photos? I guess you just gotta go with your gut- make sure they have clear eyes- smell nice and clean- I read somewhere to see how submissive they are to hold them on their backs- the ones that dont' struggle are obviously quite easy going but i'm not sure a 5 week old would do much
