If you look on the bag of dog food, most will actually have a diagram and a little description on what a healthy weight should be. You should be able to see a tummy tuck up when looking at the dog from the side (profile) and a definite waist from the top view. You don't want to see every rib, but, some visibility is all right (like if the dog is turned a certain way, it's ok to see a few ribs), and, you should be able to feel the outline of the ribs when light pressure is applied. People constantly say that Finn is "skinny", and, it drives me nuts. He's lean, yes, but, people are basically just used to seeing fat labs. I went to get him from the humane society the other day after his surgery and one of the girls made a comment. There was a lab wandering around that I thought had too much weight on him. The girl compared Finn to that lab. I retorted with, and, that dog looks like he's about to pass out from just walking. He was waddling and panting like crazy. I asked how often that lab was allowed to full out run, and, allowed to swim, and, if he was athletic. She was stumped, and, had no response. People get labs and don't exercise them, and, they get fat fast. Finn was never (and still isn't) the weight most people think is appropriate. It also has a lot to do with what you feed Happy, as far as how quickly she will gain weight. Finn's weight gain has been really slow and steady, which is good, because it gives his bones and joints time to develop. A lot of puppy food is designed to bulk the dog up really quickly, and, that can (but, doesn't always) lead to problems with proper bone development. sorry for the long answer, it was just fresh in my mind what with the encounter I had at the humane society. Take some side and top views of your pretty girl, and, let us see her.