For the poop, I would think that you want to keep the stools soft, so nothing that hardens or causes really firm stools (rice comes to mind). Maybe some fresh ground flaxseeds, as they contain natural oils and also fiber to help move things through. I wouldn't use any other type of fiber, as it could be binding.
Increasing things that have fatty acids in them would be good, stool softener if needed.
I would also consider some homeopathic tablets like Arnica to help with tissue healing, and hypericum if you think that there is nerve pain. Symphytum is the classic remedy for bone healing. http://www.ecologyhealthcenter.net/node/177
My old girl, many years ago, had a pelvic surgery (for hip dysplasia) and she healed up. I used the above remedies, in addition to just plain old time and good care.