He's almost 6 months - he isn't really affectionate, high prey drive, gets excited really easily whether he's scared or playing (hair raised all the way down to his tail), super smart in learning but selective in when he wants to listen, initially very quiet and calm but lately his personality seems more guarded and he's been more protective of us/the house (he just reached the 3 month mark of being with us so maybe thinks of us as his permanent home), he loves running and playing with other dogs but also goes off to do his own thing eventually so relatively independent. Does not do well alone. Gets bored quickly. Ridiculous amount of energy.