On those rare summer evenings (UK) when it is still over 20 degrees when the sun's gone down, we go on an adventure outside and
I have to sit for an hour or two on predator watch (fox, cat, owl . . . )
The parting in the forehead is a natural feature allowing the spines to form correctly when rolled up in a ball.
Interestingly, some Pygmy Hedgehogs' spines are fluorescent red/pink under UV light.
(Since avian predators can see in the UV spectrum, perhaps it warns them that this animal has spikes?)
"Happy HOGmanay!"
In response to "public" demand, some views of the hedgehogs' enclosure set-up.
The wider pen - my office chair (and I) are fenced off so the hog can run around the pedestal and under the desk without danger of feet.
Rubber-backed groundsheet and carpet tiles essential.