I have a 10 week old Walker pup that recently started to develop a definite bow to her front legs. Within a couple of days, she has started to walk on the outsides of her feet. Will Cod liver oil and/or a calcium supplement straighten her up, or will it simply prevent the problem from getting worse? Also, assuming this is Rickets, is it genetic, environmental, or dietary, or a combination of these? I've fed a quality puppy feed (30/20) since weaning, and they've had adequate sunlight and exercise. Thanks for your response!