Not a hedgehog - what can we do to help a scruffy looking young robin? We've got the bowl of water out and that gets changed and cleaned twice a day as its most often used as a sparrow bath. I've also got a worm patch that I keep damp, and I dig it over in the late afternoon for him.
Its probably in the post breeding moult, unless you know for sure its a juvenile from this year. Put up a bird feeder; or scatter seed on the ground. Ime, robins can use our bird feeders, but generally they prefer to feed on the ground? We have a small bird cover (like a cage that sits on the ground), which allows small birds through the bars, but not larger birds like wood pigeons, magpies, sparrowhawks, etc. Sparrowhawks do a swoop around sometimes, and at least the small birds are safe, feeding on the ground.
We put out for the birds (in either the feeders or on the ground) sunflower hearts, a robin and songbird seed mix, peanuts (not that the robins go for them usually), suet blocks, suet balls and occasionally meal worms or suet pellets. Most food goes in the feeders, and we only put enough food on the ground, so that it is all gone by tea time, as we don't want the hedgehogs eating mealworms, peanuts or sunflower hearts in the evening!
I still haven't seen a hedgehog in our garden recently; but they run under our side gate, and along the side of the house - I saw four fresh hedgehog droppings there yesterday.