Jack is a very handsome pup! He will probably be fairly large ... as I am guessing. My one rescue was 30 pounds at three months and is now 80 pounds at a 15 months old and still filling out.
that particular dog 's Mom is a Doberman/Lab and his Daddy is a Rott/Husky? mix. If Jack has Newfie .... he will probably be huge! Lol!