My dog doesn't seem to be keeping her wieght up like I think she should be.I feed her about 1 1/2 to 2 lbs. twice a day.I feed her Old Roy,with 21% protein.She just stays not very skinny,but her wieght is fair I would say.Is there any kind of dog food that can help or any thing different I can do?

Most dogs will eat all they need. If her ribs aren't showing, you don't have a problem. If she won't eat enough to keep the ribs from showing more than a little, see the vet.

As long as she is in good health, she will eat what she needs as Labman said. I'm assuming she is a large breed if she is eating that much per day. Does she look unhealthy to you? I'm just curious as to why you would want her to bulk up?