PUs: yes, go to: http://www.petcarevabeach.com/pen1.html Hilbert got to avoid a PU. He had plugging still after his bladder diverticulum and sludge surgery and he wound up having cystos (Removal of urine by needle.) which gave his urethra a chance to go down and possibly dislodged a crystal or two in his urethra. [Posted in FML issue 4674]