Dog Ultimatum!!!

[BeardyMan]

Rotty. Better get used to massive turds though (same with a baby by the way!)
Strong enough to tow / pull a cart or sled. Possibly even a plow if you have 2.

Buy the best food you can get. It's not cheap. £55 for 15kg - lasts 2 or 3 weeks We get the high calorie stuff.
Lots of exercise, but not too much when they're just a pup.
Lots of training.

It was a toss up between a doberman and a rotty for us. I went for the rotty as they're much heavier, you really know when he's got hold of you.