Bernese Puppy growth. from bmdinfo.org
A common question new Berner owners ask: "Is my puppy the 'right' size for how old he/she is?
The answer is: size of adult Berners varies; so naturally the size of Berner pups at any given point in their development will vary.
If your puppy looks smaller or larger, is taller or shorter, has heavier or lighter bones or a slighter or bulkier build, a longer or shorter coat than a Berner puppy of the same age you met somewhere - DON'T WORRY. Focus on keeping your puppy happy, healthy, work on training and on providing a nurturing, supportive environment. Your pup will grow up. Genes your pup inherited from his mother and father and ancestors control how your dog will look as an adult. Make the most of the genetic potential your pup inherited. Provide your pup with adequate nutrition and physical conditioning (exercise) during development.
Bernese are SLOW MATURING DOGS. Most Berners do not reach their adult height and weight until they are 2 or 3 years old. Berners continue to 'flesh out' and add substance and bulk well into their middle years.
Often during the first year to 18 months of age puppies look gangly, leggy or unbalanced, and gawky. How puppies walk or run during the first year might look mildly uncoordinated - especially when a big growth spurt occurs. It is not uncommon for Berner puppy's skeletons to grow unevenly. A growing puppy's rear end (butt) may be an inch or 2 higher than the front end at certain times during development. NOT TO WORRY! BE PATIENT!!! If you think about it, people look very different at 30 or 40 years of age than they looked when they were 12, 16 or 20. follow link for more great info