
The quantities of complete food really does depend on what you are feeding, but try splitting their 2 meals into 4 and see how they do.
We usually feed 3 meals of meat and biscuit and the supper meal is usually scrambled egg, milky meal etc. If they are clearing all their meals and are obviously still hungry, then increase the quantity slightly, but remember you do not want fat puppies!! If you are also giving goats milk etc through the day, make sure they are not filling themselves up on this and then not wanting their other meals.
Hope you know what you have let yourselves in for, having 2 St Bernard puppies at the same time!!
Karen