After being put in the fattening facility, is there anything more to get from gaining? I've been growing through 6 stages of blob so far but nothing seems to change.
The description of your body should gradually change as you move through the blob stages. When you reach a special scene between your feeder and a Dizzy's employee, that marks the end of the changes. I'd like to flesh it out more in future, perhaps with changing dialogue for the feeder as you get larger & some special events for each feeder type.