that's right I agree with wmssh everydog is different I don't use any formula for determining weight puppies will slim out as they get older or grow into their weight all mine have not not budged on their weight since about 4-5 months they are all still the same weight now at 8 months as they were at 4-5 months and I don't see them getting much bigger plus I have not started to condition them because they are still pups but once I do I am sure 5 lbs off them as adults will show a tremendous difference in their apperance. I wouldn't worry to much about their weight as puppies just make sure they are getting plenty of exersize and a good kibble and try not to overfeed them and you should be good to go.