thank you!! I presume his endurance is good, I'll take him out on 2 half an hour walks a day, but rarely do I take him out to an open field for him to play.. but when he is taken, he'll be over enthusiastic n play tirelessly.. I haven't tested his endurance for the sake of testing it so far.. castrating other animals is against my ideology and personal belief.. even though I get a dog which I think shouldn't be bred, I'll just not breed him.. but I avoid neutering to the extent possible..