Okay, I'll use the kitten supplement. Also, after sitting next to their cage and looking for a minute, I saw that the kit had been drinking water from the bottle right after the mom goes for some. So that's why the kit feels full at times I'm pretty sure. Should I do something about that or just leave the bottle where it is?
And that's the thing. The guy who I bought the chinchilla off of was not a breeder, and let this chinchilla in the same cage as a standard grey male from PetSmart multiple times. She is close or is (the previous owner didn't keep track) 2 years old and this is her 4th litter from the same male. I didn't know anything about breeding, but after looking things up I saw that this can be extremely stressful with back to back pregnancies and is unhealthy for the mom. Pregnancy for any animal one after the other is probably very tiring, so as happy as I am to be taking care of this kit, I don't appreciate that he let these animals together knowing that they will mate (maybe he thought they wouldn't, I will never know) and told me they had been separated for 4 months prior to me getting the mom (obviously not true now that I have a kit). I know breeding can be risky when you don't know the backgrounds of the mom or the father, so I'm fortunate I didn't see a dead kit when I walked in on the day she was born. As said before, it's just a bit upsetting to me.