Pat Ball RE: Your questions on supplementing with linatone or ferritone. We do not advise any supplementation of the above products because all the fortification you need is actually in the diet you are feeding. You can create problems by supplementing. The only time we recommend use for these products is when you are trimming nails, etc and wish to distract your furry friend or under the advise of your veterinarian. Hope this gives some help! Trish of TOT FERRET [Posted in FML issue 0952]