Because of the astonishing performance of modern digital cameras I can take these photos using the illumination from the security light (using ISO of up to 25600). I can't get all four in the right place at the same time but here are three, two adults plus a youngster on the left.
The young ones are slightly darker than their parents. Here is one of each.
These I think are the two adults.
Here is the other youngster.
I haven't managed to get all four on the video either but here is a short clip of three, playing their own version of dodgems.
The hedgehogs are very wary and make a run for it if they pick up my scent (not that I wear scent of course, but you know what I mean). The photos are taken through the half open back door.
They may have lost interest in the dog food but someone else hasn't!