This morning my guinea pig was out at playtime on a sheet and she pooped and some yellowish-green discharge came out of her bum. Sorry if TMI. I'm really concerned. It only happend once, I'm worried because we just got Capone a new little sister yesterday her name is Brooklyn and I have no idea what this could be. Has anyone experienced this before? She doesn't have diarrhea or anything like that and she is fully recovered from her URI so she no longer is taking the medication