Getting her off of Purina and on to a quality food will be very helpful. I think Chicken Soup is a great food even though I feed Nutro Natural Ultra. The Missing Link is also very good for her coat.
Like others have said, a coat problem can simply be a diet problem, but it also can be a health related endoctrine hormonal disorder, like thyroid, addisons, cushings, etc. or with the sores it could be a skin disorder of some type. I think a complete blood work up and/or skin scraping would probably be a good idea. |