If your dog has pain from the broken leg she is not going to feel much like eating. When any living creature is in pain they usually do not have an appetite. You should call your vet and make sure there are no complication from the broken leg.
Usually dogs don eat when are in any kind of pain,yes it affects the appetite of the dog,these times it's advised to feed it with what it likes the most.
A lot of times, if a dog is in pain it will most definitely affect her appetite. Check with your vet and see if they can give her something for the pain.
