urine test

Loesje has an UTI and the vet has prescribed Sulfatrim 16+80 mg/ml 0.25 ml BID for 8 days. This the first time that she has an UTI. I noticed her urine being red/brown last night. She also seems to be warmer than normal and might have some trouble urinating. She weighs 450 grams. Is this...

Hi! I regularly test my elderly rats urine to make sure everything is okay. Today after test I can see on the strip that he's positive for leukocytes and proteins. Should I be worried and trying to get a hold of our vet? He is very active, eating and drinking as normal. He is two years old...