Royal Canin Veterinary - Urinary S/O Moderate Calorie - cat dry food

I've been giving and ordering these kibbles for my cat for a long time (just changed accounts). He's a greedy one and eats as long as there's food. But lately, he doesn't eat them like he used to, he leaves some, spits some out, and asks me for something else. I'm wondering about the ingredients and the quality. Have they changed? It's a real shame because these are the only ones (though I haven't tried many others) that don't cause crystals for my cat.