Is there somehting wrong with my rat?

Question

every once in a while while rat has blood around his nose and it looks like he had a bloody nose or something. but then he seems fine..

Answer 1

It's not blood, it's porphyrin.

Occasional low levels of porphyrin staining are normal, but regular large amounts of porphyrin indicate stress, sickness, or poor diet.

Answer 2

it isn't blood, but it is caused by poor diet, and stress