not gaining weight

Question
I have a golden retriver its only 68 days old. I have been giving her royal canine stater. she is very thin and not gaining weight
she is only 2 kgs 900 grams. she is feed well but even then she is not gaining weight. i show her to the vet every week. Is there any solution for this

Answer
If she will eat more if you give it to her, go ahead.  It is very unusual for a healthy dog not to eat as much as it needs.  You should be feeding a puppy chow now. Switching to an adult chow for the larger breeds at 4 months, slows growth and helps develop sturdier joints.

Your dog definitely should be narrower at the waist than the hips and chest. You should be able to easily feel the ribs, but not see them. Each dog is different. Standard recommendations are a good place to start, but each dog must have its food and exercise adjusted to its individual needs. Here is a link to a good illustrated guide, http://www.longliveyourdog.com/twoplus/RateYourDog.aspx