I can only tell you that I had Oscie on Purina UR for over 10 years, his first attack being when he was 2 years old - I'm a believer in prescription diet if there is a need, and there certainly was, and I will always have Purina to thank for keeping him under control.
We switched to Wellness for him once Murphy was Dx'd in August because it appears to be a better food, and I want grain free for both of them. Struvite is some serious crap, and renal failure can come on pretty quick, and I have read the feedback about this topic and I think that each has their own idea of what is right and wrong, but let me tell you, I was just looking at his records from 2 years old, and that incident scared the you know what's out of me. His bladder had been full for at least 2 days and his vet told me that had I went to work, he would have been in renal failure by the time I came home, he was screaming at the top of his lungs -- ever hear a Siamese scream in pain, let alone just yowel! So I have always been a believer in a veterinary diet - but only Purina UR. Now that we have migrated over, he is only on wet food, and yes, it is true that they need fluids, but the acidity in the urine needs to stay at or below 6.5 for Ph in order to keep struvite from forming. Magnesium in the diet is a huge promoter if struvite that causes the crystals to form, and Wellness is at 0.02 or something close to that, and some times, ash can play along with that, although normally in dry food. I have researched this topic over and over. Some vets now do not think that the ash byproducts have anything to do with the crystals, but there are still some who do believe it does.
So, back on topic -- Oscie is on wet food, his diet was particularly chosen with low magnesium in mind, and so far, since the end of August, he is just fine. The problem I had was the he would not eat Murphy's Evo cat and kitten food, for he'd starve himself to death -- then we'd end up with hepatic problems. So, Wellness was probably my favorite choice. The thing I have to get back to is -- Murphy CANNOT jump on the countertop any longer, so that stupid huge chair of mine is sitting in my bedroom!!!
I believe struvite is very painful, dangerous and not something to play around with as far as food is concerned. It can cause some long-term if not very short demise for a kitty if an owner doesn't play the cards right. It was a really horrible scheme of events for me to see him with a catheter, surgery, recovery. And, he was so miserable at the hospital, after 3 days, they called me and said he was being a bad boy, and I needed to come pick him up -- sort of like a bad kid in school and the teacher calls the parents!
I've had kidney stones and when I saw him in so much pain, I remembered myself having stones and how I wanted to die. So, I believe I have chosen the right diet for him and have turned my beliefs over now to the fact that yes, there are some very good diets out there that promote healthy urinary tract, but I will always praise Purina for the UR diet. Those people know me by name!
