i have been advised to ask for a full spectrum blood test for my bitch does anyone know how many tests this involves and what exactley is being looked for.She has a skin condition sctratching /red/thin coat /.had skin scraprs nothing shown done all mite tests flea tests also food related [maybe a cause] but nothing there either so now i think maybe hormones are being loooked into .Does anyone know or has had similar problem and tests done?