I should update this, but not good news unfortunately
My little one already passed away...
After unpatiently waiting, finally came the time I could feed her. She wolfed her pinky down in a matter of seconds! And regurged the next day
My first regurge... I learned here how to deal with this, so I waited 10 days, then gave her the smallest pinky I could find, with a few slits in it. That was better, she ate it as quickly as the first one, and this time digested it fine.
Next feeding same thing, so me happy.
A few days later she was dead
I don't think it had anything to do with the last feeding, as it had been 4 days since she ate, and she pooped fine in the mean time.
Temps and stuff are like my other ones, and they thrive, so I guess that's ok. I hadn't been handeling her much yet, as I wanted her to get some flesh on her bones without me harassing her too much.
Maybe this will teach me not to buy visibly thin babies, even when they are beautifull