Would baby food have the fibre she needs? I've only ever used critical care.
Extra probiotics would probably help too....you can get acidophilus capsules from any pharmacy. Just break one open and add it to the watery cc mix.
While you're at the pharmacy, get several 15ml wide bore syringes as well, for feeding the cc mix. Eyedroppers also work, but syringes will allow you to more accurately monitor how much she is taking.
Use the search function on the forum to find tips on how to "burrito" her....it's a way of safely holding her still if she tries to fight you when you're giving her food. If she wont eat out of the syringe herself, then you will need to force feed her: this is when burritoing is invaluable.
She'll need around 100mls of cc mix a day....break up the feedings into 4-6 servings. If she'll take more, then feel free to give her more. Slow and steady wins here.
She'll probably be on Metacam for the pain, plus some prophylactic antibiotics, and you may need to burrito her to administer these as well.
Take all the shelves and furniture out of her cage: you don't want her trying to jump anywhere for at least 2-3 weeks. If she is usually on woodchips, then you'll need to change her onto fleece, as woodchips can irritate the wound. Change the fleece 2 times a day minimum. Keeping her bed clean is very important.
Watch her very very carefully for any biting at the wound. If she does this, she'll unfortunately need a cone, in which case she'll be even more dependent on you for food and water intake. You may need to hand feed single strands of hay, if she gets a cone.
When 2 of my girls went through emergency spays (due to pyometra), I put a microwaveable heat pad in their cage. I warmed it just to a gentle heat, and they loved putting their sore tummies on it. If you do this, just make sure the pad is not too hot, and that your chin is capable of moving well away from the heat pad if she wants to.
It's gonna be a tough time for both of you, but you CAN get through it. Best wishes to the both of you, and so sorry for the loss of the kits xxxx
oh and I nearly forgot to say, no dust baths for 3 weeks either. Good luck.