Gallbladder Sludge in Cats: Much Ado About Nothing? New Study Challenges Common Assumptions

How many times have you been reviewing an abdominal ultrasound report on a vaguely sick cat and seen the phrase "gallbladder sludge noted"? If you're like most practitioners, that finding probably triggers a cascade of clinical decision-making: Is this cholangitis? Should I start antibiotics? Do I need to sample the bile? Is this why the cat isn't eating?