My chinchilla gave birth a week ago, she has bred before with the previous owner. She weighs 1lb 10 ounces right now, How Long will it take her to lose her baby weight? I can also feel her spine when I pet her back, is this normal because she’s carrying excess weight in her belly or should I be concerned? She’s acting fine, eating well, nursing. The baby weighs 51 grams now, it was 45 grams the day after it was born.