Smilla Multi-Vitamin Cat Paste - cat supplements

I’ve been using this paste for 3 years, I have 2 long-haired cats. At first, my cats ate it gladly, then little by little they started liking it less and less, and eventually refused it altogether. Now there’s no way to get them to eat it. It’s a shame because the price is good and, at least at the beginning when I managed to give it to them, it worked well.