Hi Christine-
Unfortunetly you are going to need to rely on a vet, more so a veterinary nutritionist to formulate a homemade diet for a dog with a history of crystals. You can use the services of websites like petdiets.com or BalanceIt.com, but I would absolutely not recommend trying to use free recipes on the internet as they have proven time and time again to be nutrient deficient. So in that case, no homemade diets are not healthier when they are deficient in key nutrients, which they commonly are.
Which ingredients in Hill’s C/D are concerning to you? I see no ingredients personally that would cause alarm. I am also confused as to why you feel your vet is only after your money, but freely admit that C/D has helped her avoid crystal formation.
