I have a 7 month old APBT/AM.Staff who's just Great extremely affectionate. No signs of aggression what so ever. I took him to a park the other day where there is pigeons walking around everywhere and ducks near a pond, to my surprise he didn't freak out at all. I though he might want to chase them but instead he just looked at them for a second and moved on. What are you experiences with your dogs growing up? how did their personalities change? I'm trying to get an idea of how my boy might change if at all thanks for the replies!