Bumble foot and loose poop?
It is unlikely that the "infection" from the bumblefoot traveled anywhere else. Chickens' bodies are great at encapsulating infections which is why abscesses are common in birds. Bumblefoot in humans, would likely kill us through a systemic staph infection, but birds get an ugly knot on their foot that can be easily (or not so easily) removed- plucking the entire infection out in one, big, nasty kernel. Rarely, do you have any secondary infections after bumblefoot surgery.
Stools in chickens change all the time. Unless a bird is pooping straight water or tiny, bright green stools for days running, you should not worry overmuch about changes in consistency of their poop in the absence of other signs of a problem.
Is the leg of the affected foot red, hot, or swollen? How is the wound? Healing well? Or looking poorly- flaming red, hot to the touch, seeping a lot, raw edges, bleeding still? If the leg looks fine and the wound is healing well, then you have no worries about the problem becoming a systemic issue. If the leg looks poorly, then you may have a problem that needs closer investigation.
Blue green? Has she been eating red cabbage?
Has she been eating at all? Green stools are as a result of a bird not passing food through the GI system. The green color comes from excess bile that is not being used during digestion because the bird is either not eating, or the food is not getting through the system- impacted crop, sour crop, impacted gizzard, blockage in the upper portion of intestines, etc. You will also see green stools in birds that are eating an excess of roughage- grass and green leafy veg.