Hi Speedy123
I would suggest that it was either a different hedgehog or the person marking had used water based substance (the only potentially good thing about it) and it had rained or partially washed off somehow.
Whilst it is possible on a very few occasions, that someone could be seeing marks that were caused by self annointing, the marks would not persist in the same way as when someone has artificially marked the hedgehogs. Self annointing in just frothy saliva. Also, I don’t think, even hedgehogs, are clever enough to do x’s and other symbols (which some people are finding), whilst self annointing.
However much most of us probably don’t like the thought of it being done to a hedgehog, which of course does not belong to any of us, sadly, there are people out there who are purposely excessively marking hedgehogs.
