From Hedgehogs by Pat Morris:
“the average family size is about four or five, although some females have six or even seven babies. …… It is … unlikely that all of those young would survive. A more realistic expectation would be that the average mother manages to rear two, perhaps three babies per season”
So whilst it’s possible for them all to be the same family, it seems unlikely. But hoglets do seem to mingle quite readily (i.e. in feeding areas), even ones of different ages, so they could easily be from different mothers. It would be almost impossible to tell if they were related from looking at them as one litter could have more than one Father, so they could easily be quite disimilar in appearance.
If they are old enough to be going it alone, you can offer them the same food that you would offer an adult hog – cat or dog food or cat/kitten biscuits. Water is best left available all day every day. Shallow but wide plant saucers are ideal for that, but make sure they are not so deep that a hoglet could become trapped in them.
You can submit photos to the gallery. Accessed via home page or https://www.hedgehogstreet.org/gallery/ Once images are on the gallery, you should be able to include the link in a post on the Forum. Alternatively, if they are already somewhere else on the internet you can add them with a link.
Good luck and happy hog watching!