If you can find a rescue that will take it then that will be the ideal situation.
As hogs start to struggle to find food they become stressed, this in turn can lead to their ‘normal’ parasite burden becoming overwhelming and this can then kill them, so while they ‘look’ fine they often aren’t.
If you cannot find a rescue to take them, then putting out a house is a great idea, but more importantly put out good quality small dog or cat food, or obviously you can buy hedgehog food but that’s more expensive and not any better
Good luck
