Doesn't work to prevent hairballs.
I’ve tried to find an alternative to Royal Canin Hairball Care for one of my cats, a Norwegian Forest, who suffers from recurring constipation due to hairballs. The Advance one doesn’t work for her in this regard, even though it apparently has a better composition; luckily, I realised in time and was able to sort it out with Duphalac. It seemed like it would work, but turns out it doesn’t...