I have used every litter it seems. I stay away from corn based, clay. Been using grass seed litter for a couple years now. It clumps very well, no dust..Has anyone used it and has their cat been itchy obsessively, licking , seizure like episodes after licking so much...? I do not think this is the issue as my cats problems started way before I used this litter.. It may be FUS or some neurological issue...Grass seed litter does not have the pollen and I do not feel its the culprit but just thought I'd ask.. if anyone who has used it had issues...