Make a long story short. We had our Cat for a few months, first cat we ever owned. For months I was getting random hives that we first thought was bug bites but then got worse and worse into hives. Went to a doctor to get allergy test. Everything came back negative. In the meantime our cat got spayed. All hives went away. So I swithed litter to yesterdays news per the vets instructions. After that period I wanted to try out a different pellet litter and got the Breeze system. Our cat would use the Breeze system but would not cover her poop, pee smelly. So we just switch back to Dr. Elsey Precious Ultra and within 24 hours hives started again. So I am sure we found the culprit. Odd I know. But I am not going through the hive episode again. Any recommendations on other litters. Breeze system was ok but too stinky and not covering the poop would make a mess scooping it out. Would like something clumping, don’t cat if clay. I have read so many reviews and Dr. Elsey is always number one.