Any idea what both my cats clean themselves excessively?? Makes me wonder if they have OCD. Then they proceed to bring up what they have ingested. I give them fur ball remedy on a regular basis. My older cat is a long hair and I would think he’d bring up fur ball but he does not. Instead he brings of liquid or chunks of undigested food. My younger cat is a shorthair and has been bringing up fur ball. Also stomach acid stains the carpet so bad even the carpet cleaner doesn’t work to remove stain. I’m at wits end.