I stay away from oversized, generally it is not healthy, they grow way to fast and are way to large at a young age wich does affect their joints in the long run,
a 180 pound dog cant walk three miles without fading quickly, in our breed it is BEST to stick with the standard size.
those who breed for oversized are asking for nothing but trouble.grante d very few 180 pounders dont have trouble, but i have yet to see those few run and have the endurance to do the things they were meant to.
People who are impressed and brag about huge are not sold a pup from myself.
these dogs are NOT st bernards Nor are they Mastiff, if people want 180-200 pound dogs i tell them go get a mastiff.
be careful and aware of his structure keep him thin if you dont, you may have a lot of problems with joints.