So my guinea pig has been on sulfatrim for probably a month or more now, the first time was for a URI and the second was for bumble foot. She’s currently still on it but I noticed today that she has brown crust coming out of her nose and she looks a little ill, her eyes are sunken in and her fur is ruffled up. Is this a uri? I’m not sure what I should do considering she’s still on the medication for it. Any advice? She also goes back to the vet Monday for a check up on her bumble foot.