Perhaps she gets the right amount of food.
But this dog is literally underweight and just skin and bones. If you read some of my responses you can see the skin SUNKEN IN.
After increasing her food though, the diarrhea stopped, she looks much healthier, and doesn't desperately scavenge for food.
So I'm sorry, but I really think you are wrong. If your dog's spine is showing each nob and you can count all the ribs and see the bone structure without cushion... your dog is not receiving the nourishment it needs. Either because it has worms, not the proper food, or something otherwise.
You CANNOT tell me that any animal where you can see all the divots in its skeleton through its skin is healthy...?
Herp Derp