125 lbs is not abnormal for a male Rottweiler. It's the 150 to 180 lbs dogs that I don't understand. A very large Great Dane weighs 180 lbs...but they have the size to carry it. Rottweilers are a large breed...not a giant breed. The German dogs if they are well bred...are within the standard. The American/Canadian/German standard for the breed are very close in size...maybe a few centimeters difference in height. The German working lines are quite smaller then the conformations lines.Well, My Current Big boy is 90lbs BUT My Last one the RUNT was solid Muscle and head the size of a basket ball he weighed in at the vets scale at 125lbs official and he did not look fat in any way. German Bloodlines on his sires side, .I have photos.