Im no expert, raster, but Ive never heard of orange/redish poop outside of someone being kind of sick, to back that up I googled “what determines the color of feces” and you get a ton of results to cross reference. As suspected though, none of them say food matter determines color, so I would do some research to determine the cause.
I’m also no Able, but from all the posts I’ve read I think probiotics should be taken from day 1, antifungals a few weeks into it. Boosting good bacteria first should help to be your infantry before you call in the cavalry! 😀 wait a few days and see if that changes the hue back to normal