Glad to see your ferrets are showing improvements! It really is amazing the benefits of feeding raw as well as more appropriate protein sources. The changes within the ferret are not just visible and palpable, as you've seen they satisfy an inner emotional/psychological need too! If you are offering a variety of protein sources and the ferrets are eating bones you will NOT need to offer any supplemental vitamins. As there have been no studies done to confirm ferrets actual needs, you may end up unbalancing them. Besides from the research that has been done and reported, ferrets more closely follow canine genetics(except for taurine needs) so focusing on cat vitamins may not do well for the ferret. I completely avoid any products with sweeteners so that means NO ferretvite and NO hairball treatments with malt, maltodextrin, molasses, dextrose, corn syrup etc. healthy calories come from food protein and ft sources. Sugars are simply appetite enhancers but can become addictions that divert the ferret away from proper nutrition which is why kibble mfrs utilize sweeteners. Don't forget to toast5 and then pulverize the egg shells and mix them into your egg feedings, or use them to encrust the heart with. Glad to hear your diet changes are proving successful! While fat is considered fat, and ferrets don't seem to be picky about lapping up oils, my choices for them are free choice unsalted lard licks and occasional treats with extra virgin olive oil. ferrets can be oversupplemented with vitamin A so go easy on fish oils. Cheers, Kim [Posted in FML 7222]