Hi Midgecat. She won't need to go through the op if she's already had it but she will lose some fur. It's standard practice among vets to do the incision for the op on the left flank rather than than the right so if you book her in and explain the situation they will shave her first and if they find a scar they will obviously not go ahead. She won't have had any drugs at this point. If they don't find a scar they will probably shave her tummy too because in a small number of cases cats have a what's known as a mid- line op where they do the incision underneath. This method is mostly used if cats are in season or pregnant when they're done, or in 'posh' cats where the owners don't want to spoil the line of their fur.