Q. Hello just noticed black stuff all over my rats neck ?

Answered By

A. It's probably porphyrin. Their grooming pattern is nose, to face, to behind the ears, so any porphyrin that has drained out of their nose will get smeared on the back of their necks.

It can be red or turn later to black when it dries up. They often get porphyrin secreted when they are stressed or don't feel well. Have you noticed any other symptoms?

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