Possible causes are severe constipation, urinary tract
disease, or lower urinary tract
obstruction. The latter is common in males and can be fatal. Immediate veterinary care is critical.
Vomiting - vomiting several times within the hour, especially if blood appears in the vomitus, the cat is lethargic, or refuses to eat. Possible causes include ingestion of a foreign object, liver and kidney disease, gastrointestinal problems, and poisoning.