update
Mom's been fully healed for a couple weeks and is finally growing some tummy hair back! She wouldn't let me take a pic of it though. Her teeth are a starting to be healthier orange color at the root too but she is still down on weight. (687g where as post spay she was 822g and pre pregnancy 850g) She hasn't gained or lost in the last week though so I'm letting her be.
Baby is fat and rambunctious, 175g and 6 weeks old. I posted some updated pics of Czari having lunch after a long snooze in my lap. =3 Now she is snoozing again. She's actually taking less milk now and much more hay. She still turns her nose up at pellets.
Mom and Dad have been living together now that Fattie (the mom) is healed up. She is a full spay so don't worry about pregnancy! I let Czari stay with them a few hours a day for socialization and warmth while I work or sleep.
Any tips on making fattie fat again, or should I be looking for a new nickname. =x She currently gets oxbow pellets, timothy hay, one handful of alfalfa every other day, and a cheerio for a treat. I know 687g is still a good size for a chinchilla, and at 850g she did have fat pouches under her arms, but her hips look a bit baggy and she looks a bit washed out to me. While you can't feel her bones/spine she seems like she should have at least 50 more grams to her...