Your veterinarian will assess your dog's overall health and can check for worms. Also, make sure you're feeding the proper amount each day. My Bernese pup weighed 38 pounds at four months, 77 pounds at 18 months. Much of how a pup develops is genetic. Check the size of both parents and grandparents if you can. Remember there is considerable variation in size within the breed. You may just have a runt.
Answered by lmontague - 12/14/2013 7:16:19 AM