My female cat was diagnosed with dry form FIP back in early Dec. 2014. She is still with us. She declined despite all the meds from the vet. I still give the Interferon. At about 5 months she had gone from 12 lbs down to 7. You could see her spine. I looked high and low for something to give her. I had decided to try Iron and vitamin D3. She has gone back up to just over 9 1/2 lbs and even when you pet her you do not feel her spine. She acts like nothing is wrong with her at all and I will continue with this. I have opted to give her gluten free canned food for breakfast and for dinner her normal canned friskies. I also keep dry gluten free mixed with her Kit and Kaboodle that she has always loved.