MArk, I was in a similar situation to you, Snowy hated all the prescription food when she had liver probs - she liked the dry, but couldn't eat it all the time with being toothless. I ended up accepting that she wouldn't have as long with me cos she wasn't eating 'special' food, but it was nearly a year before her raised liver enzymes developed into something more serious (and that again could have been managed, but she hated meds, so I opted for quality over quantity again). I personally think in illnesses that can only be managed rather than cured, quality of life is much more important - no point buying them years with prescrip food if they hate eating it and dont enjoy themselves.