Thank you! I had a cry this morning because I didn't know to do and was late for work because I was trying to make sure Pickle got some food in her. I weighed her this morning and she's lighter than she is normally, but fortunately she's a bit of a chonk anyway. And I have to go through all this with Jasmine soon as well!
Please read our weight guide - it is very precise and specific about weights for the sake of people suffering from anxiety. If Pickle is still eating, then offering an extra bowl of mushed up pellets/recovery and pellet mix twice daily can go quite a way. Only step in with more support measures if needed.
Any overweight in chunky piggies will come off very quickly which is why their initial weight loss is often larger; also keep in mind that the organs taken out account for a little of the weight loss (about 30-100g, depending on how large any ovarian cysts were).
However, in any illness/crisis your first aim is always to slow down and stop any further weight loss while they are not well but don't get bogged down over it and just keep an eye on it as much as possible. I always prefer to weigh my own ill piggies first thing in the morning as that gives me the best notice as to how much they have eaten overnight on their own before I feed breakfast and any additional support whenever that is necessary so they are set up for the day.
As long as Pickle is still a good general weight, then you need not worry badly. Get up half an hour earlier in the morning for the time being in order to allow for that.