No rush at all, I know I bombarded you!
I'm treating for cocci in case, but doubtful that's the issue. Thanks for your concern. This happened once before, few months back, and I treated them w/Corid but I only ever saw a couple sporadic weird poops. More likely it might be threadworms (heard they can cause bleeding)? So I'll be deworming soon, too... But as of now, they are fine, and any poops since have been normal. I need to just take a break from looking at their poop (soon I'll start seeing it every time I close my eyes).