I went down to feed the boys this morning and discovered blood on the shavings concentrated to one corner of the pen. I immediately called the vet and brought Ben in. After an xray and exam, Ben has a UTI so he's on smz for 14 days and some pain meds. He does have a tiny stone that is small enough it may pass as per the vet. At least it explains why he's been a little antsy the past couple days.