Male or female didnt matter in Napoleons case i think, he only had one kidney and these stones were close to the dead one which was just a ball but two entered his bladderr and he was getting blocked. prior to this at previous vets advice was taken from bristol after an xray showed the stones, it was not known how long he had had them or how long he had only one working kidney, they advised to leave them..............if only we hadnt listened!
when the current vets put him on a catheter he was fine cos it moved them back but as soon as catheter was removed he reblocked and a scan/xray showed what was happening.
his bladder had to be opened to remove them and i saw them after one was very small but the other bigger.
i had rushed him to the vet after he showed me he couldnt use the tray and gareth said it was only just in time, sadly he never recovered properly and although i brought him home overnight a couple of times he just refused to eat and after a month of treatment his kidney went and i lost my beautiful boy