[big black dogs]

From seeing her picture posted in you other thread...I doubt very much that she is a purebred Rottweiler. She looks like she is mixed with something else. At 6 months of age she should be about 50 lbs. What food are you feeding? I would start feeding her more if her ribs and hips are sticking out. You can also add an egg, or some cooked meat, yogurt, pasta to her meals.

Has she been wormed regularly?

 

[big black dogs]

Try feeding her kibble...she needs to be eating a balanced diet if you want her to grow properly. You only have one chance to grow them out as a puppy...she may be lacking in calcium, phosphorus , zinc, and other vitamins. Get her on a good meat based kibble and add some extras if you want....but a good kibble has all of what she needs right now.