Has anyone heard of a Dr Marty Goldstein a holistic vet promoting his pre mixpowder? My moms dog who is 11 yrs old despite making changes to her diet, she eats homemade lightly steamed organic beef in morning and cornecupia canned at night. still at times has slight loose stool in mid day . Morning stool is good and formed but mid day after a walk and after first stool comes out, the last part is very soft, almost a thick liquid? She is on Adored beast probiotic now but I may need to change. The premix is all natural K9 but she does not seem to like that powder mix anymore. Any recommends on how to add her minerals and vitamins to organic beef with carrots puréed as she gets canned the other meal, or is she getting enough without the added supplements since she is having canned once a day? She also gets a pinch of SFN too in her foods. Maybe just an enzyme to help her absorb, any recommendations?