Royal Canin Sensible - cat dry food

I bought this as my cat has the symptoms that other reviewers described - probs with diarrhoea. This food made no difference whatsoever, the diarhhoea continues as bad as ever.

My tomcat can't tolerate the food. He's losing his fur and getting sick, and after trying different foods, we've figured out it's the food that's causing it.

The granules smell again, reeking of rotten meat. I have no idea what they're made from. Is it just pure rendering plant waste? When I started buying them years ago, I actually enjoyed smelling them—they had a really pleasant scent. The change happened when production moved from Poland. Since then, they've stunk.

I have 3 cats and all 3 hate this food! I have to mix it with other foods and even then they only eat it if they're really hungry! I don't understand why, but it must taste really awful, since they're not picky at all!