If you wait too long even for the first time you visit she starves. I think it was set to 7 days without food before she starves, so if you found her after that time you have to wait for your next playtrough.
With this day length, you'll be tired of feeding her all the time... but, it's up to you ) The first time I played with a 4 minutes day. And eventually I just left her to her fate, because her feeding took like half of my playing time...
