Please keep in mind that what you see initially are the pre-op poos and then the funny poos that signal operation drug and the feeding gap during/recovery. And only then are you getting what is going on post-op. It all happens with a 1-2 days delay, depending on how fast the internal conveyor belt between mouth and anus runs. You always have to take that into your considerations or you are comparing apples with pears, as we say in German.
Food intake and poo output are not instantaneous; that is why weighing daily is so important. It gives you an up to date monitoring input. During a severe illness or difficult operation recovery you should not get bogged down on the number of poos or their look or size - as long as your piggy is not eating fulling by themselves, they will reflect that. What really counts is that you aim at this stage is to keep the weight from dropping, if at all possible and to get as much fibre, probiotics and poo soup (if you have a healthy companion) into her as she is willing to take. The thicker and the more fibrous the poos, the better because that means that the gut is normalising. Yours are on the way there; you just have to be a bit more patient yet - but you are on the right way. The poos look about what you would expect for this stage.
Anything over 10-15 ml means that your piggy is doing well and that you can aim for trying to get as closely to 90 ml into her over 24 hours as possible - and you will see the results of the coming through in the next couple of day both in terms of the weight starting to go up, the poos looking increasingly healthier and her energy levels.
Also keep in mind that it takes about 2-4 days for the body to settle down and the healing process really getting underway after an operation.