Ok so one of my rats always has porhin sorry can't spell ( the red stuff) and it's normal for him but my other had some today and he has never had it in his life. Should I take him to the vet. Please help
A small amount of porphyrin could be no more worrisome than you waking up with what we call "sleep" in your eyes. If there is a lot or there are other symptoms like sneezing, rattly breathing or whatever, then a vet will be in order.