My cat (posted previously in this thread alongside his oil painting portrait
) also has the crystal issue. He has to eat prescription cat food only. His small ear (that was mostly chewed off by another animal in a fight) also tends to gunk up, presumably because the inside of the ear is more exposed to the elements, so we have to clean his little ear every other week or so. There are several other things he has going on, but suffice it say, he is kind of high maintenance. He's my buddy though, so I don't mind, and I joke that he's my Luxury Cat (because of his extreme finnickiness on several things, including those above)