Hmm, rubbing it in their fur is normally OK, they cant normally bear to leave something sticky in their fur. I have only had two cats that liked Katalax, and I was lucky that both would just eat it straight from the tube. You can also get the hard hairball treats, but in my experience, the only ones who liked them were the ones who liked the paste. Defurrum treats didn't go down well with the cats that liked Katalax thougj