The average weight of the full grown mastiff, is quite big! Height: 27-30 in. to the shoulder of the dog Weight: 120-250 lbs. Note: Some mastiffs can weigh less or weigh more, or can be taller or...
they can get to 150 pounds when they are seven mth.
Male: 26-30 inches. Female: 24-28 inches.
You can't. You can't increase the number of toes you have either.