Ferocious cat had vomiting for one week and is not eating now.
Kidney disease is one possible cause in older cats. But how to collect blood?
Sedation needed. Injection IM via the carrier.
Blood test showed slight elevation of creatinine and urea.
Cat was treated with antibiotics and recovered fully.
"He starts to scratch his scratching post and nudging me," the owner was happy when I phoned up one week later.