My cat has had a urinary blockage due to struvite crystals in his urine, he was catherised, put on antibiotics, loxicom and hypovase. Prescribed RC Urinary S/O with Cystaid Plus. He has had catheter out now for two weeks, still has cystitus, and is off the antibiotics now, but is still taking the hypovase and loxicom. About two weeks after he first started eating this RC food, he started to vomit up hairballs daily, and I've noticed he keeps shaking his ears like they are itching, and he rubs his eyes frantically. He's starting to get very thin in his 'eyebrow' area. It seems like to me he is grooming 5 times as much as my other healthy cat. Hes also scratching his neck (where vet shaved him during catheter procedure), keeps chewing one of his back paws and has a lot of dandruff, the skin in his ears are slightly red looking. I'm pretty sure he has an allergic reaction due to the food, that's what it seems like to me. Problem is last time i went to the vet, he just said the vomiting was most likely stress related, but at the time I hadn't noticed the odd grooming/itching behaviour so didn't mention it, as at the time the vomiting hairballs had just started. Surely this RC food isn't the only thing to stop struvite crystals from forming? From what I can find online, a high meat wet diet should keep his urine PH acidic naturally. I'm looking at Natures Menu, avoiding any fish flavours, as I read that's no good for a cat with urinary issues. Can anyone offer me any advice? Has anyone encountered urinary issues with their cats but cant use the RC urinary food due to food sensitivities. I mean I looked at the ingredients, its meat, meat deriatives (5% chicken), the next ingredient is cereals! Followed by vegetable deriatives and various sugars?! So I don't understand, is it just laboratory altered to address the urine PH issue so they can avoid using high grade meat? (which i presume is not profit effective for them). I honestly just don't know what to do, seeing my cat suffer, and then being scared to death about the struvite crystal issue.