I fed my Russians this morning, as usual. My female passed urine while feeding, which is not uncommon, but it looked like it had a slight tinge of red or pink in it. She was not behaving abnormally, and still had as good an appetite as ever, but I can't help but wonder if she has blood in her urine for some reason. Have you ever seen this? What's it from? Will it happen again unless I intervene?