I hope Rutherford gets rid of the mucous. Am I right that he will need a special diet to prevent the plug from forming again?

I had the problem that Tigris wasn't drinking. After much trying with tuna (no interest), cat milk plus water (no interest), homemade salt free chicken broth (no interest) we found that we can add a little water to the wet food. Since then he is really peeing a lot, so all that rinsing of the urinary tract should work fine.